- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200612-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: AMD64 x86 emulation base libraries: OpenSSL multiple vulnerabilities Date: December 11, 2006 Bugs: #152640 ID: 200612-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== OpenSSL contains multiple vulnerabilities including the possible execution of remote arbitrary code. Background ========== OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport Layer Security protocols and a general-purpose cryptography library. The x86 emulation base libraries for AMD64 contain a vulnerable version of OpenSSL. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 emul-linux-x86-baselibs < 2.5.5 >= 2.5.5 ------------------------------------------------------------------- # Package 1 only applies to AMD64 users. Description =========== Tavis Ormandy and Will Drewry, both of the Google Security Team, discovered that the SSL_get_shared_ciphers() function contains a buffer overflow vulnerability, and that the SSLv2 client code contains a flaw leading to a crash. Additionally, Dr. Stephen N. Henson found that the ASN.1 handler contains two Denial of Service vulnerabilities: while parsing an invalid ASN.1 structure and while handling certain types of public key. Impact ====== An attacker could trigger the buffer overflow by sending a malicious suite of ciphers to an application using the vulnerable function, and thus execute arbitrary code with the rights of the user running the application. An attacker could also consume CPU and/or memory by exploiting the Denial of Service vulnerabilities. Finally, a malicious server could crash a SSLv2 client through the SSLv2 vulnerability. Workaround ========== There is no known workaround at this time. Resolution ========== All AMD64 x86 emulation base libraries users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-emulation/emul-linux-x86-baselibs-2.5.5" References ========== [ 1 ] CVE-2006-2937 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2937 [ 2 ] CVE-2006-2940 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2940 [ 3 ] CVE-2006-3738 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3738 [ 4 ] CVE-2006-4343 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4343 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200612-11.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@xxxxxxxxxx or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2006 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
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