ID

VAR-201609-0481

CVE

CVE-2016-7052

TITLE

OpenSSL of crypto/x509/x509_vfy.c Service disruption in (DoS) Vulnerabilities

DESCRIPTION

crypto/x509/x509_vfy.c in OpenSSL 1.0.2i allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) by triggering a CRL operation. Supplementary information : CWE Vulnerability type by CWE-476: NULL Pointer Dereference (NULL Pointer dereference ) Has been identified. OpenSSL is prone to denial-of-service vulnerability. An attacker may exploit this issue to crash the affected application, resulting in a denial-of-service condition. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201612-16 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: OpenSSL: Multiple vulnerabilities Date: December 07, 2016 Bugs: #581234, #585142, #585276, #591454, #592068, #592074, #592082, #594500, #595186 ID: 201612-16 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in OpenSSL, the worst of which allows attackers to conduct a time based side-channel attack. Background ========== OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general purpose cryptography library. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/openssl < 1.0.2j >= 1.0.2j Description =========== Multiple vulnerabilities have been discovered in OpenSSL. Please review the CVE identifiers and the International Association for Cryptologic Research's (IACR) paper, "Make Sure DSA Signing Exponentiations Really are Constant-Time" for further details. Additionally, a time based side-channel attack may allow a local attacker to recover a private DSA key. Workaround ========== There is no known workaround at this time. Resolution ========== All OpenSSL users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.2j" References ========== [ 1 ] CVE-2016-2105 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2105 [ 2 ] CVE-2016-2106 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2106 [ 3 ] CVE-2016-2107 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2107 [ 4 ] CVE-2016-2108 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2108 [ 5 ] CVE-2016-2109 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2109 [ 6 ] CVE-2016-2176 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2176 [ 7 ] CVE-2016-2177 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2177 [ 8 ] CVE-2016-2178 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2178 [ 9 ] CVE-2016-2180 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2180 [ 10 ] CVE-2016-2183 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-2183 [ 11 ] CVE-2016-6304 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6304 [ 12 ] CVE-2016-6305 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6305 [ 13 ] CVE-2016-6306 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6306 [ 14 ] CVE-2016-7052 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7052 [ 15 ] Make Sure DSA Signing Exponentiations Really are Constant-Time http://eprint.iacr.org/2016/594.pdf Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201612-16 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 2016 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 . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 [slackware-security] openssl (SSA:2016-270-01) New openssl packages are available for Slackware 14.2 and -current to fix a security issue. Here are the details from the Slackware 14.2 ChangeLog: +--------------------------+ patches/packages/openssl-1.0.2j-i586-1_slack14.2.txz: Upgraded. This update fixes a security issue: Missing CRL sanity check (CVE-2016-7052) For more information, see: https://www.openssl.org/news/secadv/20160926.txt https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7052 (* Security fix *) patches/packages/openssl-solibs-1.0.2j-i586-1_slack14.2.txz: Upgraded. +--------------------------+ Where to find the new packages: +-----------------------------+ Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating FTP and rsync hosting to the Slackware project! :-) Also see the "Get Slack" section on http://slackware.com for additional mirror sites near you. Updated packages for Slackware 14.2: ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/openssl-1.0.2j-i586-1_slack14.2.txz ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/openssl-solibs-1.0.2j-i586-1_slack14.2.txz Updated packages for Slackware x86_64 14.2: ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/openssl-1.0.2j-x86_64-1_slack14.2.txz ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/openssl-solibs-1.0.2j-x86_64-1_slack14.2.txz Updated packages for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/a/openssl-solibs-1.0.2j-i586-1.txz ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/openssl-1.0.2j-i586-1.txz Updated packages for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/a/openssl-solibs-1.0.2j-x86_64-1.txz ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/n/openssl-1.0.2j-x86_64-1.txz MD5 signatures: +-------------+ Slackware 14.2 packages: cf3e90f91b35ee96f5a900e5f2ec8fd5 openssl-1.0.2j-i586-1_slack14.2.txz 31cc46351fdd4c487f75abdbfcd696e7 openssl-solibs-1.0.2j-i586-1_slack14.2.txz Slackware x86_64 14.2 packages: 333fd278752b5f04a805aeabd77f28c4 openssl-1.0.2j-x86_64-1_slack14.2.txz 6b25daf23b1cfc59351308b9c11e830a openssl-solibs-1.0.2j-x86_64-1_slack14.2.txz Slackware -current packages: 98337bdfe00f04be784953fee5c023ca a/openssl-solibs-1.0.2j-i586-1.txz 3cd05a7ed655e7f51f652a31b9b908e7 n/openssl-1.0.2j-i586-1.txz Slackware x86_64 -current packages: 6907d9a091ace959d8f04aa92cd7e5f6 a/openssl-solibs-1.0.2j-x86_64-1.txz 4017d82d5c4c370ab6850a5d623d321a n/openssl-1.0.2j-x86_64-1.txz Installation instructions: +------------------------+ Upgrade the packages as root: # upgradepkg openssl-1.0.2j-i586-1_slack14.2.txz openssl-solibs-1.0.2j-i586-1_slack14.2.txz +-----+ Slackware Linux Security Team http://slackware.com/gpg-key security@slackware.com +------------------------------------------------------------------------+ | To leave the slackware-security mailing list: | +------------------------------------------------------------------------+ | Send an email to majordomo@slackware.com with this text in the body of | | the email message: | | | | unsubscribe slackware-security | | | | You will get a confirmation message back containing instructions to | | complete the process. Please do not reply to this email address. | +------------------------------------------------------------------------+ -----BEGIN PGP SIGNATURE----- iEYEARECAAYFAlfpZcsACgkQakRjwEAQIjPMMACbB1R3zcPgLf11KPr1jtmRE7PN BvgAnjd81wwT0k1DTOieELSStonzadsk =AuZJ -----END PGP SIGNATURE-----

AFFECTED PRODUCTS