ID

VAR-200908-0708

CVE

CVE-2009-2412

TITLE

APR Library and APR-util Integer overflow vulnerability in the library

DESCRIPTION

Multiple integer overflows in the Apache Portable Runtime (APR) library and the Apache Portable Utility library (aka APR-util) 0.9.x and 1.3.x allow remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via vectors that trigger crafted calls to the (1) allocator_alloc or (2) apr_palloc function in memory/unix/apr_pools.c in APR; or crafted calls to the (3) apr_rmm_malloc, (4) apr_rmm_calloc, or (5) apr_rmm_realloc function in misc/apr_rmm.c in APR-util; leading to buffer overflows. NOTE: some of these details are obtained from third party information. Apache APR (Apache Portable Runtime) and 'APR-util' are prone to multiple integer-overflow vulnerabilities. Attackers can exploit these issues to execute arbitrary code in the context of an application that uses the affected library. Successful exploits will compromise the affected application and possibly the computer. Failed attacks will cause denial-of-service conditions. This could cause the library to return a memory area which smaller than requested, resulting a heap overflow and possibly arbitrary code execution. For the old stable distribution (etch), this problem has been fixed in version 1.2.7-9 of the apr package, and version 1.2.7+dfsg-2+etch3 of the apr-util package. For the stable distribution (lenny), this problem has been fixed in version 1.2.12-5+lenny1 of the apr package and version 1.2.12-5+lenny1 of the apr-util package. For the unstable distribution (sid), this problem will be fixed soon. Upgrade instructions - -------------------- wget url will fetch the file for you dpkg -i file.deb will install the referenced file. If you are using the apt-get package manager, use the line for sources.list as given below: apt-get update will update the internal database apt-get upgrade will install corrected packages You may use an automated update by adding the resources from the footer to the proper configuration. Debian GNU/Linux 4.0 alias etch - ------------------------------- Source archives: http://security.debian.org/pool/updates/main/a/apr-util/apr-util_1.2.7+dfsg.orig.tar.gz Size/MD5 checksum: 643328 a3117be657f99e92316be40add59b9ff http://security.debian.org/pool/updates/main/a/apr-util/apr-util_1.2.7+dfsg-2+etch3.dsc Size/MD5 checksum: 1036 9dc256c005a7f544c4d5c410b226fb74 http://security.debian.org/pool/updates/main/a/apr/apr_1.2.7-9.diff.gz Size/MD5 checksum: 26613 021ef3aa5b3a9fc021779a0b6a6a4ec9 http://security.debian.org/pool/updates/main/a/apr-util/apr-util_1.2.7+dfsg-2+etch3.diff.gz Size/MD5 checksum: 21651 e090ebfd7174c90bae4e4935a3d3db15 http://security.debian.org/pool/updates/main/a/apr/apr_1.2.7.orig.tar.gz Size/MD5 checksum: 1102370 aea926cbe588f844ad9e317157d60175 http://security.debian.org/pool/updates/main/a/apr/apr_1.2.7-9.dsc Size/MD5 checksum: 856 89662625fd7a34ceb514087de869d918 alpha architecture (DEC Alpha) http://security.debian.org/pool/updates/main/a/apr/libapr1_1.2.7-9_alpha.deb Size/MD5 checksum: 121726 df1e2d6e8bf9ed485ad417fe274eb0e3 http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1_1.2.7+dfsg-2+etch3_alpha.deb Size/MD5 checksum: 83690 b5873275f420b15f9868ea0dde699c60 http://security.debian.org/pool/updates/main/a/apr/libapr1-dev_1.2.7-9_alpha.deb Size/MD5 checksum: 371668 4e8bd42151f3cdf8cee91c49599aab42 http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1-dbg_1.2.7+dfsg-2+etch3_alpha.deb Size/MD5 checksum: 129158 5074639b4b0d9877ff29b96540fdfaec http://security.debian.org/pool/updates/main/a/apr/libapr1-dbg_1.2.7-9_alpha.deb Size/MD5 checksum: 185420 ddf84849ff3bee792dc187c6d21958bd http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1-dev_1.2.7+dfsg-2+etch3_alpha.deb Size/MD5 checksum: 148140 079cff06535a7e3f4e9a5d682d80bb1b amd64 architecture (AMD x86_64 (AMD64)) http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1_1.2.7+dfsg-2+etch3_amd64.deb Size/MD5 checksum: 72946 6b11e4b65bdf67981a091177d9644007 http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1-dev_1.2.7+dfsg-2+etch3_amd64.deb Size/MD5 checksum: 126156 b420f555d02504e0497a0ba3c27e0cac http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1-dbg_1.2.7+dfsg-2+etch3_amd64.deb Size/MD5 checksum: 127742 1606857f3291ccb10e038219f1f2eab3 http://security.debian.org/pool/updates/main/a/apr/libapr1-dbg_1.2.7-9_amd64.deb Size/MD5 checksum: 187302 bb1a4aa5768fa012201ad1e72bc27e93 http://security.debian.org/pool/updates/main/a/apr/libapr1-dev_1.2.7-9_amd64.deb Size/MD5 checksum: 348120 b5d6b4e7c628dffe867159b54b6c82f1 http://security.debian.org/pool/updates/main/a/apr/libapr1_1.2.7-9_amd64.deb Size/MD5 checksum: 111664 6b51dc29ea4defa975902d246188086f arm architecture (ARM) 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http://security.debian.org/pool/updates/main/a/apr/libapr1_1.2.7-9_i386.deb Size/MD5 checksum: 109138 4aa254cacd4e95785ae823cedb1cce2f http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1-dbg_1.2.7+dfsg-2+etch3_i386.deb Size/MD5 checksum: 122136 4a16475bb5780625902c79069681ae74 http://security.debian.org/pool/updates/main/a/apr/libapr1-dbg_1.2.7-9_i386.deb Size/MD5 checksum: 180654 481471d06045a2e348b55de6dbdf5f94 ia64 architecture (Intel ia64) http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1-dev_1.2.7+dfsg-2+etch3_ia64.deb Size/MD5 checksum: 156562 52761fff3e82e21728e0c6a79bf4508f http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1_1.2.7+dfsg-2+etch3_ia64.deb Size/MD5 checksum: 99446 3ad58d882e434e39be525e7aa41d9e93 http://security.debian.org/pool/updates/main/a/apr/libapr1_1.2.7-9_ia64.deb Size/MD5 checksum: 141894 5b7351a6b4c3765e3d76b9d22e04cf0e 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http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1_1.2.7+dfsg-2+etch3_mips.deb Size/MD5 checksum: 70776 6fe66f5cb81c2a3af2fa0cd64a85cfd8 http://security.debian.org/pool/updates/main/a/apr/libapr1-dev_1.2.7-9_mips.deb Size/MD5 checksum: 357368 aab08f1596aead97cc48924ebf99c80e http://security.debian.org/pool/updates/main/a/apr/libapr1_1.2.7-9_mips.deb Size/MD5 checksum: 112644 9c6d720999259453daaa13e8ec3c8336 mipsel architecture (MIPS (Little Endian)) http://security.debian.org/pool/updates/main/a/apr/libapr1-dbg_1.2.7-9_mipsel.deb Size/MD5 checksum: 186464 5b2392a143ff8a173a771b819377ab47 http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1-dbg_1.2.7+dfsg-2+etch3_mipsel.deb Size/MD5 checksum: 128052 02e3c278190e92d7131c275aab5f5c44 http://security.debian.org/pool/updates/main/a/apr/libapr1-dev_1.2.7-9_mipsel.deb Size/MD5 checksum: 358010 480087a77642a8ff99a32bb323b62600 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http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1_1.2.12+dfsg-8+lenny4_sparc.deb Size/MD5 checksum: 72738 ec558ed4277ca676f07e3181ffad0335 http://security.debian.org/pool/updates/main/a/apr-util/libaprutil1-dev_1.2.12+dfsg-8+lenny4_sparc.deb Size/MD5 checksum: 124976 22385c13d934c3877ce2f9eeaa4584e3 These files will probably be moved into the stable distribution on its next update. - --------------------------------------------------------------------------------- For apt-get: deb http://security.debian.org/ stable/updates main For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main Mailing list: debian-security-announce@lists.debian.org Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iQEcBAEBAgAGBQJKfcqtAAoJEL97/wQC1SS+6T4IAJxpIZ7AUOwmDtuOk/WQzlzv U1nz6YhC9nhf/QdjbmAe0+ClaGwP5FZOacfEK6t64DBJ/81qgLtHlh6hlbm2+9wD 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This update provides fixes for these vulnerabilities. Update: apr-util packages were missing for Mandriva Enterprise Server 5 i586, this has been adressed with this update. (CVE-2009-0023). The expat XML parser in the apr_xml_* interface in xml/apr_xml.c in Apache APR-util before 1.3.7, as used in the mod_dav and mod_dav_svn modules in the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via a crafted XML document containing a large number of nested entity references, as demonstrated by a PROPFIND request, a similar issue to CVE-2003-1564 (CVE-2009-1955). Packages for 2008.0 are being provided due to extended support for Corporate products. The updated packages have been patched to prevent this. _______________________________________________________________________ References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2412 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0023 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1955 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1956 _______________________________________________________________________ Updated Packages: Mandriva Linux 2008.0: d55d5dd456de0c7977f93bff217406d7 2008.0/i586/apr-util-dbd-mysql-1.2.10-1.1mdv2008.0.i586.rpm bd02eb2233dcc07aadd7e5eb84df9ce8 2008.0/i586/apr-util-dbd-pgsql-1.2.10-1.1mdv2008.0.i586.rpm 334e127fb8ac03379c8a5f2ee7c144b6 2008.0/i586/apr-util-dbd-sqlite3-1.2.10-1.1mdv2008.0.i586.rpm 4307983fb3d21ab0f9955711e116f92e 2008.0/i586/libapr1-1.2.11-1.1mdv2008.0.i586.rpm ff24f1e1587f2210346ea134d4a2053e 2008.0/i586/libapr-devel-1.2.11-1.1mdv2008.0.i586.rpm 3d50a85109e011ced9e36f1565e9bc69 2008.0/i586/libapr-util1-1.2.10-1.1mdv2008.0.i586.rpm b786e2329fc63d459b841bf001261543 2008.0/i586/libapr-util-devel-1.2.10-1.1mdv2008.0.i586.rpm 6ef7669ea3d0db3dbaed35f35ae2dbdc 2008.0/SRPMS/apr-1.2.11-1.1mdv2008.0.src.rpm 1a923fc9c2f912ef339b942a59bff4e6 2008.0/SRPMS/apr-util-1.2.10-1.1mdv2008.0.src.rpm Mandriva Linux 2008.0/X86_64: 91588bbcf3940cd106b0fe458be6d4b9 2008.0/x86_64/apr-util-dbd-mysql-1.2.10-1.1mdv2008.0.x86_64.rpm b71d8b14cc536cf8a2448b353d2b4047 2008.0/x86_64/apr-util-dbd-pgsql-1.2.10-1.1mdv2008.0.x86_64.rpm 10b889bb625dbae01711ed7e8e101744 2008.0/x86_64/apr-util-dbd-sqlite3-1.2.10-1.1mdv2008.0.x86_64.rpm 068334fc392c68f9b29e629dd3776f83 2008.0/x86_64/lib64apr1-1.2.11-1.1mdv2008.0.x86_64.rpm a9ed011d8b421e8604e66a87a4972477 2008.0/x86_64/lib64apr-devel-1.2.11-1.1mdv2008.0.x86_64.rpm c08da53c4c88464249f46c6577f3c2a8 2008.0/x86_64/lib64apr-util1-1.2.10-1.1mdv2008.0.x86_64.rpm 4b1b86a3e07f4b87a1a53f0dbaaa3aff 2008.0/x86_64/lib64apr-util-devel-1.2.10-1.1mdv2008.0.x86_64.rpm 6ef7669ea3d0db3dbaed35f35ae2dbdc 2008.0/SRPMS/apr-1.2.11-1.1mdv2008.0.src.rpm 1a923fc9c2f912ef339b942a59bff4e6 2008.0/SRPMS/apr-util-1.2.10-1.1mdv2008.0.src.rpm _______________________________________________________________________ To upgrade automatically use MandrivaUpdate or urpmi. The verification of md5 checksums and GPG signatures is performed automatically for you. All packages are signed by Mandriva for security. You can obtain the GPG public key of the Mandriva Security Team by executing: gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98 You can view other update advisories for Mandriva Linux at: http://www.mandriva.com/security/advisories If you want to report vulnerabilities, please contact security_(at)_mandriva.com _______________________________________________________________________ Type Bits/KeyID Date User ID pub 1024D/22458A98 2000-07-10 Mandriva Security Team <security*mandriva.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iD8DBQFLGEWRmqjQ0CJFipgRAsWiAJ9LbNZNAkUIxWbq84aERpTacFEJPACg0xgy wuYdtSQeV/bOOP7w17qo2V0= =V8dA -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ . Subversion clients and servers, versions 1.6.0 - 1.6.3 and all versions < 1.5.7, are vulnerable to several heap overflow problems which may lead to remote code execution. The official advisory (mirrored at http://subversion.tigris.org/security/CVE-2009-2411-advisory.txt) follows: Subversion clients and servers up to 1.6.3 (inclusive) have heap overflow issues in the parsing of binary deltas. Summary: ======== Subversion clients and servers have multiple heap overflow issues in the parsing of binary deltas. This is related to an allocation vulnerability in the APR library used by Subversion. Clients with commit access to a vulnerable server can cause a remote heap overflow; servers can cause a heap overflow on vulnerable clients that try to do a checkout or update. This can lead to a DoS (an exploit has been tested) and to arbitrary code execution (no exploit tested, but the possibility is clear). Known vulnerable: ================= Subversion clients and servers <= 1.5.6. Subversion clients and servers 1.6.0 through 1.6.3 (inclusive). Known fixed: ============ Subversion 1.6.4 Subversion 1.5.7 (Search for "Patch" below to see the patches from 1.6.3 -> 1.6.4 and 1.5.6 -> 1.5.7. Search for "Recommendations" to get URLs for the 1.6.4 release and associated APR library patch.) Details: ======== The libsvn_delta library does not contain sufficient input validation of svndiff streams. If a stream with large windows is processed, one of several integer overflows may lead to some boundary checks incorrectly passing, which in turn can lead to a heap overflow. Severity: ========= A remote attacker with commit access to repository may be able to execute code on a Subversion server. A malicious server may be able to execute code on a Subversion client. Recommendations: ================ We recommend all users to upgrade to Subversion 1.6.4. We recommend all users to upgrade to the latest versions of APR and APR-UTIL, or apply the CVE-2009-2412 patch appropriate to their APR installation from <http://www.apache.org/dist/apr/patches/>. New Subversion packages can be found at: http://subversion.tigris.org/project_packages.html References: =========== CVE-2009-2411 (Subversion) CVE-2009-2412 (APR) Reported by: ============ Matt Lewis, Google. Patches: ======== This patch applies to Subversion 1.6.x (apply with patch -p0 < patchfile): [[[ Index: subversion/libsvn_delta/svndiff.c =================================================================== --- subversion/libsvn_delta/svndiff.c (revision 38519) +++ subversion/libsvn_delta/svndiff.c (working copy) @@ -60,10 +60,23 @@ struct encoder_baton { apr_pool_t *pool; }; +/* This is at least as big as the largest size of an integer that + encode_int can generate; it is sufficient for creating buffers for + it to write into. This assumes that integers are at most 64 bits, + and so 10 bytes (with 7 bits of information each) are sufficient to + represent them. */ +#define MAX_ENCODED_INT_LEN 10 +/* This is at least as big as the largest size for a single instruction. */ +#define MAX_INSTRUCTION_LEN (2*MAX_ENCODED_INT_LEN+1) +/* This is at least as big as the largest possible instructions + section: in theory, the instructions could be SVN_DELTA_WINDOW_SIZE + 1-byte copy-from-source instructions (though this is very unlikely). */ +#define MAX_INSTRUCTION_SECTION_LEN (SVN_DELTA_WINDOW_SIZE*MAX_INSTRUCTION_LEN) /* Encode VAL into the buffer P using the variable-length svndiff integer format. Return the incremented value of P after the - encoded bytes have been written. + encoded bytes have been written. P must point to a buffer of size + at least MAX_ENCODED_INT_LEN. This encoding uses the high bit of each byte as a continuation bit and the other seven bits as data bits. High-order data bits are @@ -85,7 +98,7 @@ encode_int(char *p, svn_filesize_t val) svn_filesize_t v; unsigned char cont; - assert(val >= 0); + SVN_ERR_ASSERT_NO_RETURN(val >= 0); /* Figure out how many bytes we'll need. */ v = val >> 7; @@ -96,6 +109,8 @@ encode_int(char *p, svn_filesize_t val) n++; } + SVN_ERR_ASSERT_NO_RETURN(n <= MAX_ENCODED_INT_LEN); + /* Encode the remaining bytes; n is always the number of bytes coming after the one we're encoding. */ while (--n >= 0) @@ -112,7 +127,7 @@ encode_int(char *p, svn_filesize_t val) static void append_encoded_int(svn_stringbuf_t *header, svn_filesize_t val) { - char buf[128], *p; + char buf[MAX_ENCODED_INT_LEN], *p; p = encode_int(buf, val); svn_stringbuf_appendbytes(header, buf, p - buf); @@ -168,7 +183,7 @@ window_handler(svn_txdelta_window_t *window, void svn_stringbuf_t *i1 = svn_stringbuf_create("", pool); svn_stringbuf_t *header = svn_stringbuf_create("", pool); const svn_string_t *newdata; - char ibuf[128], *ip; + char ibuf[MAX_INSTRUCTION_LEN], *ip; const svn_txdelta_op_t *op; apr_size_t len; @@ -346,6 +361,8 @@ decode_file_offset(svn_filesize_t *val, const unsigned char *p, const unsigned char *end) { + if (p + MAX_ENCODED_INT_LEN < end) + end = p + MAX_ENCODED_INT_LEN; /* Decode bytes until we're done. */ *val = 0; while (p < end) @@ -365,6 +382,8 @@ decode_size(apr_size_t *val, const unsigned char *p, const unsigned char *end) { + if (p + MAX_ENCODED_INT_LEN < end) + end = p + MAX_ENCODED_INT_LEN; /* Decode bytes until we're done. */ *val = 0; while (p < end) @@ -382,7 +401,7 @@ decode_size(apr_size_t *val, data is not compressed. */ static svn_error_t * -zlib_decode(svn_stringbuf_t *in, svn_stringbuf_t *out) +zlib_decode(svn_stringbuf_t *in, svn_stringbuf_t *out, apr_size_t limit) { apr_size_t len; char *oldplace = in->data; @@ -390,6 +409,13 @@ static svn_error_t * /* First thing in the string is the original length. */ in->data = (char *)decode_size(&len, (unsigned char *)in->data, (unsigned char *)in->data+in->len); + if (in->data == NULL) + return svn_error_create(SVN_ERR_SVNDIFF_INVALID_COMPRESSED_DATA, NULL, + _("Decompression of svndiff data failed: no size")); + if (len > limit) + return svn_error_create(SVN_ERR_SVNDIFF_INVALID_COMPRESSED_DATA, NULL, + _("Decompression of svndiff data failed: " + "size too large")); /* We need to subtract the size of the encoded original length off the * still remaining input length. */ in->len -= (in->data - oldplace); @@ -487,10 +513,10 @@ count_and_verify_instructions(int *ninst, return svn_error_createf (SVN_ERR_SVNDIFF_INVALID_OPS, NULL, _("Invalid diff stream: insn %d cannot be decoded"), n); - else if (op.length <= 0) + else if (op.length == 0) return svn_error_createf (SVN_ERR_SVNDIFF_INVALID_OPS, NULL, - _("Invalid diff stream: insn %d has non-positive length"), n); + _("Invalid diff stream: insn %d has length zero"), n); else if (op.length > tview_len - tpos) return svn_error_createf (SVN_ERR_SVNDIFF_INVALID_OPS, NULL, @@ -499,7 +525,8 @@ count_and_verify_instructions(int *ninst, switch (op.action_code) { case svn_txdelta_source: - if (op.length > sview_len - op.offset) + if (op.length > sview_len - op.offset || + op.offset > sview_len) return svn_error_createf (SVN_ERR_SVNDIFF_INVALID_OPS, NULL, _("Invalid diff stream: " @@ -565,11 +592,11 @@ decode_window(svn_txdelta_window_t *window, svn_fi instin = svn_stringbuf_ncreate((const char *)data, insend - data, pool); instout = svn_stringbuf_create("", pool); - SVN_ERR(zlib_decode(instin, instout)); + SVN_ERR(zlib_decode(instin, instout, MAX_INSTRUCTION_SECTION_LEN)); ndin = svn_stringbuf_ncreate((const char *)insend, newlen, pool); ndout = svn_stringbuf_create("", pool); - SVN_ERR(zlib_decode(ndin, ndout)); + SVN_ERR(zlib_decode(ndin, ndout, SVN_DELTA_WINDOW_SIZE)); newlen = ndout->len; data = (unsigned char *)instout->data; @@ -685,6 +712,14 @@ write_handler(void *baton, if (p == NULL) return SVN_NO_ERROR; + if (tview_len > SVN_DELTA_WINDOW_SIZE || + sview_len > SVN_DELTA_WINDOW_SIZE || + /* for svndiff1, newlen includes the original length */ + newlen > SVN_DELTA_WINDOW_SIZE + MAX_ENCODED_INT_LEN || + inslen > MAX_INSTRUCTION_SECTION_LEN) + return svn_error_create(SVN_ERR_SVNDIFF_CORRUPT_WINDOW, NULL, + _("Svndiff contains a too-large window")); + /* Check for integer overflow. */ if (sview_offset < 0 || inslen + newlen < inslen || sview_len + tview_len < sview_len @@ -841,6 +876,14 @@ read_window_header(svn_stream_t *stream, svn_files SVN_ERR(read_one_size(inslen, stream)); SVN_ERR(read_one_size(newlen, stream)); + if (*tview_len > SVN_DELTA_WINDOW_SIZE || + *sview_len > SVN_DELTA_WINDOW_SIZE || + /* for svndiff1, newlen includes the original length */ + *newlen > SVN_DELTA_WINDOW_SIZE + MAX_ENCODED_INT_LEN || + *inslen > MAX_INSTRUCTION_SECTION_LEN) + return svn_error_create(SVN_ERR_SVNDIFF_CORRUPT_WINDOW, NULL, + _("Svndiff contains a too-large window")); + /* Check for integer overflow. */ if (*sview_offset < 0 || *inslen + *newlen < *inslen || *sview_len + *tview_len < *sview_len Index: subversion/libsvn_delta/text_delta.c =================================================================== --- subversion/libsvn_delta/text_delta.c (revision 38519) +++ subversion/libsvn_delta/text_delta.c (working copy) @@ -548,7 +548,7 @@ svn_txdelta_target_push(svn_txdelta_window_handler /* Functions for applying deltas. */ /* Ensure that BUF has enough space for VIEW_LEN bytes. */ -static APR_INLINE void +static APR_INLINE svn_error_t * size_buffer(char **buf, apr_size_t *buf_size, apr_size_t view_len, apr_pool_t *pool) { @@ -557,8 +557,11 @@ size_buffer(char **buf, apr_size_t *buf_size, *buf_size *= 2; if (*buf_size < view_len) *buf_size = view_len; + SVN_ERR_ASSERT(APR_ALIGN_DEFAULT(*buf_size) >= *buf_size); *buf = apr_palloc(pool, *buf_size); } + + return SVN_NO_ERROR; } @@ -659,7 +662,7 @@ apply_window(svn_txdelta_window_t *window, void *b >= ab->sbuf_offset + ab->sbuf_len))); /* Make sure there's enough room in the target buffer. */ - size_buffer(&ab->tbuf, &ab->tbuf_size, window->tview_len, ab->pool); + SVN_ERR(size_buffer(&ab->tbuf, &ab->tbuf_size, window->tview_len, ab->pool)); /* Prepare the source buffer for reading from the input stream. */ if (window->sview_offset != ab->sbuf_offset @@ -668,7 +671,8 @@ apply_window(svn_txdelta_window_t *window, void *b char *old_sbuf = ab->sbuf; /* Make sure there's enough room. */ - size_buffer(&ab->sbuf, &ab->sbuf_size, window->sview_len, ab->pool); + SVN_ERR(size_buffer(&ab->sbuf, &ab->sbuf_size, window->sview_len, + ab->pool)); /* If the existing view overlaps with the new view, copy the * overlap to the beginning of the new buffer. */ ]]] This patch applies to Subversion 1.5.x: [[[ Index: subversion/libsvn_delta/svndiff.c =================================================================== --- subversion/libsvn_delta/svndiff.c (revision 38498) +++ subversion/libsvn_delta/svndiff.c (working copy) @@ -55,10 +55,23 @@ struct encoder_baton { apr_pool_t *pool; }; +/* This is at least as big as the largest size of an integer that + encode_int can generate; it is sufficient for creating buffers for + it to write into. This assumes that integers are at most 64 bits, + and so 10 bytes (with 7 bits of information each) are sufficient to + represent them. */ +#define MAX_ENCODED_INT_LEN 10 +/* This is at least as big as the largest size for a single instruction. */ +#define MAX_INSTRUCTION_LEN (2*MAX_ENCODED_INT_LEN+1) +/* This is at least as big as the largest possible instructions + section: in theory, the instructions could be SVN_DELTA_WINDOW_SIZE + 1-byte copy-from-source instructions (though this is very unlikely). */ +#define MAX_INSTRUCTION_SECTION_LEN (SVN_DELTA_WINDOW_SIZE*MAX_INSTRUCTION_LEN) /* Encode VAL into the buffer P using the variable-length svndiff integer format. Return the incremented value of P after the - encoded bytes have been written. + encoded bytes have been written. P must point to a buffer of size + at least MAX_ENCODED_INT_LEN. This encoding uses the high bit of each byte as a continuation bit and the other seven bits as data bits. High-order data bits are @@ -91,6 +104,8 @@ encode_int(char *p, svn_filesize_t val) n++; } + assert(n <= MAX_ENCODED_INT_LEN); + /* Encode the remaining bytes; n is always the number of bytes coming after the one we're encoding. */ while (--n >= 0) @@ -107,7 +122,7 @@ encode_int(char *p, svn_filesize_t val) static void append_encoded_int(svn_stringbuf_t *header, svn_filesize_t val) { - char buf[128], *p; + char buf[MAX_ENCODED_INT_LEN], *p; p = encode_int(buf, val); svn_stringbuf_appendbytes(header, buf, p - buf); @@ -163,7 +178,7 @@ window_handler(svn_txdelta_window_t *window, void svn_stringbuf_t *i1 = svn_stringbuf_create("", pool); svn_stringbuf_t *header = svn_stringbuf_create("", pool); const svn_string_t *newdata; - char ibuf[128], *ip; + char ibuf[MAX_INSTRUCTION_LEN], *ip; const svn_txdelta_op_t *op; apr_size_t len; @@ -341,6 +356,8 @@ decode_file_offset(svn_filesize_t *val, const unsigned char *p, const unsigned char *end) { + if (p + MAX_ENCODED_INT_LEN < end) + end = p + MAX_ENCODED_INT_LEN; /* Decode bytes until we're done. */ *val = 0; while (p < end) @@ -360,6 +377,8 @@ decode_size(apr_size_t *val, const unsigned char *p, const unsigned char *end) { + if (p + MAX_ENCODED_INT_LEN < end) + end = p + MAX_ENCODED_INT_LEN; /* Decode bytes until we're done. */ *val = 0; while (p < end) @@ -377,7 +396,7 @@ decode_size(apr_size_t *val, data is not compressed. */ static svn_error_t * -zlib_decode(svn_stringbuf_t *in, svn_stringbuf_t *out) +zlib_decode(svn_stringbuf_t *in, svn_stringbuf_t *out, apr_size_t limit) { apr_size_t len; char *oldplace = in->data; @@ -385,6 +404,13 @@ static svn_error_t * /* First thing in the string is the original length. */ in->data = (char *)decode_size(&len, (unsigned char *)in->data, (unsigned char *)in->data+in->len); + if (in->data == NULL) + return svn_error_create(SVN_ERR_SVNDIFF_INVALID_COMPRESSED_DATA, NULL, + _("Decompression of svndiff data failed: no size")); + if (len > limit) + return svn_error_create(SVN_ERR_SVNDIFF_INVALID_COMPRESSED_DATA, NULL, + _("Decompression of svndiff data failed: " + "size too large")); /* We need to subtract the size of the encoded original length off the * still remaining input length. */ in->len -= (in->data - oldplace); @@ -482,10 +508,10 @@ count_and_verify_instructions(int *ninst, return svn_error_createf (SVN_ERR_SVNDIFF_INVALID_OPS, NULL, _("Invalid diff stream: insn %d cannot be decoded"), n); - else if (op.length <= 0) + else if (op.length == 0) return svn_error_createf (SVN_ERR_SVNDIFF_INVALID_OPS, NULL, - _("Invalid diff stream: insn %d has non-positive length"), n); + _("Invalid diff stream: insn %d has length zero"), n); else if (op.length > tview_len - tpos) return svn_error_createf (SVN_ERR_SVNDIFF_INVALID_OPS, NULL, @@ -494,7 +520,8 @@ count_and_verify_instructions(int *ninst, switch (op.action_code) { case svn_txdelta_source: - if (op.length > sview_len - op.offset) + if (op.length > sview_len - op.offset || + op.offset > sview_len) return svn_error_createf (SVN_ERR_SVNDIFF_INVALID_OPS, NULL, _("Invalid diff stream: " @@ -560,11 +587,11 @@ decode_window(svn_txdelta_window_t *window, svn_fi instin = svn_stringbuf_ncreate((const char *)data, insend - data, pool); instout = svn_stringbuf_create("", pool); - SVN_ERR(zlib_decode(instin, instout)); + SVN_ERR(zlib_decode(instin, instout, MAX_INSTRUCTION_SECTION_LEN)); ndin = svn_stringbuf_ncreate((const char *)insend, newlen, pool); ndout = svn_stringbuf_create("", pool); - SVN_ERR(zlib_decode(ndin, ndout)); + SVN_ERR(zlib_decode(ndin, ndout, SVN_DELTA_WINDOW_SIZE)); newlen = ndout->len; data = (unsigned char *)instout->data; @@ -680,6 +707,14 @@ write_handler(void *baton, if (p == NULL) return SVN_NO_ERROR; + if (tview_len > SVN_DELTA_WINDOW_SIZE || + sview_len > SVN_DELTA_WINDOW_SIZE || + /* for svndiff1, newlen includes the original length */ + newlen > SVN_DELTA_WINDOW_SIZE + MAX_ENCODED_INT_LEN || + inslen > MAX_INSTRUCTION_SECTION_LEN) + return svn_error_create(SVN_ERR_SVNDIFF_CORRUPT_WINDOW, NULL, + _("Svndiff contains a too-large window")); + /* Check for integer overflow. */ if (sview_offset < 0 || inslen + newlen < inslen || sview_len + tview_len < sview_len @@ -836,6 +871,14 @@ read_window_header(svn_stream_t *stream, svn_files SVN_ERR(read_one_size(inslen, stream)); SVN_ERR(read_one_size(newlen, stream)); + if (*tview_len > SVN_DELTA_WINDOW_SIZE || + *sview_len > SVN_DELTA_WINDOW_SIZE || + /* for svndiff1, newlen includes the original length */ + *newlen > SVN_DELTA_WINDOW_SIZE + MAX_ENCODED_INT_LEN || + *inslen > MAX_INSTRUCTION_SECTION_LEN) + return svn_error_create(SVN_ERR_SVNDIFF_CORRUPT_WINDOW, NULL, + _("Svndiff contains a too-large window")); + /* Check for integer overflow. */ if (*sview_offset < 0 || *inslen + *newlen < *inslen || *sview_len + *tview_len < *sview_len Index: subversion/libsvn_delta/text_delta.c =================================================================== --- subversion/libsvn_delta/text_delta.c (revision 38498) +++ subversion/libsvn_delta/text_delta.c (working copy) @@ -498,7 +498,7 @@ svn_txdelta_target_push(svn_txdelta_window_handler /* Functions for applying deltas. */ /* Ensure that BUF has enough space for VIEW_LEN bytes. */ -static APR_INLINE void +static APR_INLINE svn_error_t * size_buffer(char **buf, apr_size_t *buf_size, apr_size_t view_len, apr_pool_t *pool) { @@ -507,8 +507,13 @@ size_buffer(char **buf, apr_size_t *buf_size, *buf_size *= 2; if (*buf_size < view_len) *buf_size = view_len; + if (APR_ALIGN_DEFAULT(*buf_size) < *buf_size) + return svn_error_create(SVN_ERR_SVNDIFF_INVALID_OPS, NULL, + "Diff stream resulted in invalid buffer size."); *buf = apr_palloc(pool, *buf_size); } + + return SVN_NO_ERROR; } @@ -609,7 +614,7 @@ apply_window(svn_txdelta_window_t *window, void *b >= ab->sbuf_offset + ab->sbuf_len))); /* Make sure there's enough room in the target buffer. */ - size_buffer(&ab->tbuf, &ab->tbuf_size, window->tview_len, ab->pool); + SVN_ERR(size_buffer(&ab->tbuf, &ab->tbuf_size, window->tview_len, ab->pool)); /* Prepare the source buffer for reading from the input stream. */ if (window->sview_offset != ab->sbuf_offset @@ -618,7 +623,8 @@ apply_window(svn_txdelta_window_t *window, void *b char *old_sbuf = ab->sbuf; /* Make sure there's enough room. */ - size_buffer(&ab->sbuf, &ab->sbuf_size, window->sview_len, ab->pool); + SVN_ERR(size_buffer(&ab->sbuf, &ab->sbuf_size, window->sview_len, + ab->pool)); /* If the existing view overlaps with the new view, copy the * overlap to the beginning of the new buffer. */ ]]] . The Apache Portable Runtime Utility Library (aka APR-Util) provides an interface to functionality such as XML parsing, string matching and databases connections. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/apr < 1.3.8 >= 1.3.8 2 dev-libs/apr-util < 1.3.9 >= 1.3.9 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. ------------------------------------------------------------------- Description =========== Matt Lewis reported multiple Integer overflows in the apr_rmm_malloc(), apr_rmm_calloc(), and apr_rmm_realloc() functions in misc/apr_rmm.c of APR-Util and in memory/unix/apr_pools.c of APR, both occurring when aligning memory blocks. Impact ====== A remote attacker could entice a user to connect to a malicious server with software that uses the APR or act as a malicious client to a server that uses the APR (such as Subversion or Apache servers), possibly resulting in the execution of arbitrary code with the privileges of the user running the application. Workaround ========== There is no known workaround at this time. Resolution ========== All Apache Portable Runtime users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose =dev-libs/apr-1.3.8 All APR Utility Library users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose =dev-libs/apr-util-1.3.9 References ========== [ 1 ] CVE-2009-2412 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2412 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200909-03.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2009 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5 . =========================================================== Ubuntu Security Notice USN-813-2 August 08, 2009 apache2 vulnerability CVE-2009-2412 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libapr0 2.0.55-4ubuntu2.7 After a standard system upgrade you need to restart any applications using apr, such as Subversion and Apache, to effect the necessary changes. Details follow: USN-813-1 fixed vulnerabilities in apr. This update provides the corresponding updates for apr as provided by Apache on Ubuntu 6.06 LTS. Updated packages for Ubuntu 6.06 LTS: Source archives: http://security.ubuntu.com/ubuntu/pool/main/a/apache2/apache2_2.0.55-4ubuntu2.7.diff.gz Size/MD5: 126010 68da83341313e1b166fe345138d1eaa5 http://security.ubuntu.com/ubuntu/pool/main/a/apache2/apache2_2.0.55-4ubuntu2.7.dsc Size/MD5: 1156 0b17c48d0880ab82c769c41d1aff7002 http://security.ubuntu.com/ubuntu/pool/main/a/apache2/apache2_2.0.55.orig.tar.gz Size/MD5: 6092031 45e32c9432a8e3cf4227f5af91b03622 Architecture independent packages: http://security.ubuntu.com/ubuntu/pool/main/a/apache2/apache2-doc_2.0.55-4ubuntu2.7_all.deb Size/MD5: 2125530 9356b79c2b1591ffec1a6cd1974f82fd amd64 architecture (Athlon64, Opteron, EM64T Xeon): http://security.ubuntu.com/ubuntu/pool/main/a/apache2/apache2-common_2.0.55-4ubuntu2.7_amd64.deb Size/MD5: 833902 08b8aaf66aa52e6fd9dbed1647bb5dd2 http://security.ubuntu.com/ubuntu/pool/main/a/apache2/apache2-mpm-perchild_2.0.55-4ubuntu2.7_amd64.deb Size/MD5: 229124 400d32297652e4976456cb7b367cc435 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8707670bfb577280d9b5d0689c51608c

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

digital error

CONFIGURATIONS

PATCH

EXTERNAL IDS