ID

VAR-200711-0560

CVE

CVE-2007-1661

TITLE

PCRE In the library UTF-8 Service disruption related to the handling of regular expressions other than (DoS) Vulnerabilities

DESCRIPTION

Perl-Compatible Regular Expression (PCRE) library before 7.3 backtracks too far when matching certain input bytes against some regex patterns in non-UTF-8 mode, which allows context-dependent attackers to obtain sensitive information or cause a denial of service (crash), as demonstrated by the "\X?\d" and "\P{L}?\d" patterns. Perl-Compatible Regular Expression (PCRE) The library contains UTF-8 When processing regular expression strings in modes other than, important information is leaked or service operation is interrupted because it is read in excess from the beginning. (DoS) There is a vulnerability that becomes a condition.“\X?\d” and “\P{L}?\d” Format regular expression UTF-8 When used in other modes, important information is taken or service operation is interrupted (DoS) There is a possibility of being put into a state. PCRE regular-expression library is prone to multiple security vulnerabilities. Attackers can exploit these issues to execute arbitrary code, cause denial-of-service conditions, or launch other attacks in the context of the application using the affected library. PCRE (Perl Compatible Regular Expressions) is an open source regular expression library written in C language developed by software developer Philip Hazel. There is an information leakage vulnerability in pcre's method of processing certain malformed regular expressions. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - ------------------------------------------------------------------------ Debian Security Advisory DSA-1399-1 security@debian.org http://www.debian.org/security/ Florian Weimer November 5th, 2007 http://www.debian.org/security/faq - ------------------------------------------------------------------------ Package : pcre3 Vulnerability : several Problem type : local (remote) Debian-specific: no CVE Ids : CVE-2007-1659 CVE-2007-1660 CVE-2007-1661 CVE-2007-1662 CVE-2007-4766 CVE-2007-4767 CVE-2007-4768 Tavis Ormandy of the Google Security Team has discovered several security issues in PCRE, the Perl-Compatible Regular Expression library, which potentially allow attackers to execute arbitrary code by compiling specially crafted regular expressions. Version 7.0 of the PCRE library featured a major rewrite of the regular expression compiler, and it was deemed infeasible to backport the security fixes in version 7.3 to the versions in Debian's stable and oldstable distributions (6.7 and 4.5, respectively). Therefore, this update contains version 7.3, with special patches to improve the compatibility with the older versions. As a result, extra care is necessary when applying this update. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2007-1659 Unmatched \Q\E sequences with orphan \E codes can cause the compiled regex to become desynchronized, resulting in corrupt bytecode that may result in multiple exploitable conditions. CVE-2007-1660 Multiple forms of character class had their sizes miscalculated on initial passes, resulting in too little memory being allocated. CVE-2007-1661 Multiple patterns of the form \X?\d or \P{L}?\d in non-UTF-8 mode could backtrack before the start of the string, possibly leaking information from the address space, or causing a crash by reading out of bounds. CVE-2007-1662 A number of routines can be fooled into reading past the end of an string looking for unmatched parentheses or brackets, resulting in a denial of service. CVE-2007-4766 Multiple integer overflows in the processing of escape sequences could result in heap overflows or out of bounds reads/writes. CVE-2007-4767 Multiple infinite loops and heap overflows were disovered in the handling of \P and \P{x} sequences, where the length of these non-standard operations was mishandled. CVE-2007-4768 Character classes containing a lone unicode sequence were incorrectly optimised, resulting in a heap overflow. For the stable distribution (etch), these problems have been fixed in version 6.7+7.4-2. For the old stable distribution (sarge), these problems have been fixed in version 4.5+7.4-1. For the unstable distribution (sid), these problems have been fixed in version 7.3-1. 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 3.1 alias sarge - -------------------------------- Source archives: http://security.debian.org/pool/updates/main/p/pcre3/pcre3_4.5+7.4-1.dsc Size/MD5 checksum: 883 c0a3ccb50369530f99e2316800fc8235 http://security.debian.org/pool/updates/main/p/pcre3/pcre3_4.5+7.4-1.diff.gz Size/MD5 checksum: 95042 afc6a74beeef8cf5d176f67c69d24134 http://security.debian.org/pool/updates/main/p/pcre3/pcre3_4.5+7.4.orig.tar.gz Size/MD5 checksum: 1106897 de886b22cddc8eaf620a421d3041ee0b Architecture independent packages: http://security.debian.org/pool/updates/main/p/pcre3/pgrep_4.5+7.4-1_all.deb Size/MD5 checksum: 762 6eaceaa90e829e7cdfa06fb998bb8233 alpha architecture (DEC Alpha) http://security.debian.org/pool/updates/main/p/pcre3/libpcre3-dev_4.5+7.4-1_alpha.deb Size/MD5 checksum: 218176 350cc1e53f59d700e499d1a748f8cbd8 http://security.debian.org/pool/updates/main/p/pcre3/libpcre3_4.5+7.4-1_alpha.deb Size/MD5 checksum: 191076 fb92cd7ca9ef7716e60160acea9d8074 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http://security.debian.org/pool/updates/main/p/pcre3/libpcre3-dev_6.7+7.4-2_sparc.deb Size/MD5 checksum: 247038 10cace98a25999d4a8cf15536a7e95f6 http://security.debian.org/pool/updates/main/p/pcre3/libpcrecpp0_6.7+7.4-2_sparc.deb Size/MD5 checksum: 88598 09bb6fa7dd8ebf1d3a18b46be0e398d4 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 v1.4.6 (GNU/Linux) iD8DBQFHL1oIXm3vHE4uyloRAst9AJ9IYwptSQJseS8EhIFA0AlapSqwhACgwkTF ts06dbP/9f/Sc2fR26Y2NMc= =iaWe -----END PGP SIGNATURE----- . =========================================================== Ubuntu Security Notice USN-547-1 November 27, 2007 pcre3 vulnerabilities CVE-2007-1659, CVE-2007-1660, CVE-2007-1661, CVE-2007-1662, CVE-2007-4766, CVE-2007-4767, CVE-2007-4768 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 6.10 Ubuntu 7.04 Ubuntu 7.10 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: libpcre3 7.4-0ubuntu0.6.06.1 libpcrecpp0 7.4-0ubuntu0.6.06.1 Ubuntu 6.10: libpcre3 7.4-0ubuntu0.6.10.1 libpcrecpp0 7.4-0ubuntu0.6.10.1 Ubuntu 7.04: libpcre3 7.4-0ubuntu0.7.04.1 libpcrecpp0 7.4-0ubuntu0.7.04.1 Ubuntu 7.10: libpcre3 7.4-0ubuntu0.7.10.1 libpcrecpp0 7.4-0ubuntu0.7.10.1 After a standard system upgrade you need to reboot your computer to effect the necessary changes. Due to the large internal code changes needed to solve outstanding flaws, it was not possible to backport all the upstream security fixes to the earlier released versions. Details follow: Tavis Ormandy and Will Drewry discovered multiple flaws in the regular expression handling of PCRE. He reported an error when processing "\Q\E" sequences with unmatched "\E" codes that can lead to the compiled bytecode being corrupted (CVE-2007-1659). Further improper calculations of memory boundaries were reported when matching certain input bytes against regex patterns in non UTF-8 mode (CVE-2007-1661) and when searching for unmatched brackets or parentheses (CVE-2007-1662). PCRE does not properly handle "\P" and "\P{x}" sequences which can lead to heap-based buffer overflows or trigger the execution of infinite loops (CVE-2007-4767), PCRE is also prone to an error when optimizing character classes containing a singleton UTF-8 sequence which might lead to a heap-based buffer overflow (CVE-2007-4768). Chris Evans also reported multiple integer overflow vulnerabilities in PCRE when processing a large number of named subpatterns ("name_count") or long subpattern names ("max_name_size") (CVE-2006-7227), and via large "min", "max", or "duplength" values (CVE-2006-7228) both possibly leading to buffer overflows. Another vulnerability was reported when compiling patterns where the "-x" or "-i" UTF-8 options change within the pattern, which might lead to improper memory calculations (CVE-2006-7230). Workaround ========== There is no known workaround at this time. Resolution ========== All PCRE users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/libpcre-7.3-r1" References ========== [ 1 ] CVE-2006-7227 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-7227 [ 2 ] CVE-2006-7228 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-7228 [ 3 ] CVE-2006-7230 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-7230 [ 4 ] CVE-2007-1659 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1659 [ 5 ] CVE-2007-1660 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1660 [ 6 ] CVE-2007-1661 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1661 [ 7 ] CVE-2007-1662 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1662 [ 8 ] CVE-2007-4766 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4766 [ 9 ] CVE-2007-4767 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4767 [ 10 ] CVE-2007-4768 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4768 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200711-30.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 http://bugs.gentoo.org. License ======= Copyright 2007 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. This update ensures that kazehakase uses that supported library, and not its own embedded and insecure version. We recommend that you upgrade your kazehakase package. Updated packages have been patched to prevent this issue. _______________________________________________________________________ References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1659 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1660 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1661 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1662 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4766 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4767 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4768 _______________________________________________________________________ Updated Packages: Mandriva Linux 2007.1: e3eadb5dc3ae91ffc735a0021bb4c3b8 2007.1/i586/libpcre-devel-7.3-0.1mdv2007.1.i586.rpm 8eee92b33ed6f6be95cae33249242dfa 2007.1/i586/libpcre0-7.3-0.1mdv2007.1.i586.rpm 42e1ac0e8188b5f142e645c1ff6bb44d 2007.1/i586/pcre-7.3-0.1mdv2007.1.i586.rpm a03dca7708aa437655a393b0fe66f3c0 2007.1/SRPMS/pcre-7.3-0.1mdv2007.1.src.rpm Mandriva Linux 2007.1/X86_64: 370f8de2c9166883cbbcb2968b0575ec 2007.1/x86_64/lib64pcre-devel-7.3-0.1mdv2007.1.x86_64.rpm 306b2a144a25e1025d4ed02f3878b9dc 2007.1/x86_64/lib64pcre0-7.3-0.1mdv2007.1.x86_64.rpm 29b00561151987446eaaa3f0aaac5684 2007.1/x86_64/pcre-7.3-0.1mdv2007.1.x86_64.rpm a03dca7708aa437655a393b0fe66f3c0 2007.1/SRPMS/pcre-7.3-0.1mdv2007.1.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 v1.4.7 (GNU/Linux) iD8DBQFHM08lmqjQ0CJFipgRAvYTAKC+/5/D4RgCUnWInSK3iWw02iIZhACgliaH go5yp5LfVMY1jIk+EpEQgy0= =vGOF -----END PGP SIGNATURE-----

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

design error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Tavis Ormandy taviso@gentoo.org

SOURCES

LAST UPDATE DATE

2024-11-23T21:09:26.162000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE