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[ GLSA 200609-05 ] OpenSSL, AMD64 x86 emulation base libraries: RSA signature forgery
From: Sune Kloppenborg Jeppesen <jaervosz () gentoo org>
Date: Thu, 7 Sep 2006 22:05:07 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200609-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: OpenSSL, AMD64 x86 emulation base libraries: RSA signature forgery Date: September 07, 2006 Bugs: #146375, #146438 ID: 200609-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== OpenSSL fails to properly validate PKCS #1 v1.5 signatures. 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 openssl < 0.9.7k >= 0.9.7k 2 emul-x86-linux-baselibs < 2.5.2 >= 2.5.2 ------------------------------------------------------------------- # Package 2 [app-emulation/emul-x86-linux-baselibs] only applies to AMD64 users. NOTE: Any packages listed without architecture tags apply to all architectures... ------------------------------------------------------------------- 2 affected packages ------------------------------------------------------------------- Description =========== Daniel Bleichenbacher discovered that it might be possible to forge signatures signed by RSA keys with the exponent of 3. Impact ====== Since several CAs are using an exponent of 3 it might be possible for an attacker to create a key with a false CA signature. 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-0.9.7k" All AMD64 x86 emulation base libraries users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-emulation/emul-x86-linux-baselibs-2.5.2" References ========== [ 1 ] CVE-2006-4339 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4339 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200609-05.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 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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- [ GLSA 200609-05 ] OpenSSL, AMD64 x86 emulation base libraries: RSA signature forgery Sune Kloppenborg Jeppesen (Sep 07)