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[ GLSA 200510-11 ] OpenSSL: SSL 2.0 protocol rollback
From: Thierry Carrez <koon () gentoo org>
Date: Wed, 12 Oct 2005 13:51:45 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200510-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Low Title: OpenSSL: SSL 2.0 protocol rollback Date: October 12, 2005 Bugs: #108852 ID: 200510-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== When using a specific option, OpenSSL can be forced to fallback to the less secure SSL 2.0 protocol. Background ========== OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport Layer Security protocols and a general-purpose cryptography library. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/openssl < 0.9.8-r1 >= 0.9.8-r1 *>= 0.9.7h *>= 0.9.7g-r1 *>= 0.9.7e-r2 Description =========== Applications setting the SSL_OP_MSIE_SSLV2_RSA_PADDING option (or the SSL_OP_ALL option, that implies it) can be forced by a third-party to fallback to the less secure SSL 2.0 protocol, even if both parties support the more secure SSL 3.0 or TLS 1.0 protocols. Impact ====== A man-in-the-middle attacker can weaken the encryption used to communicate between two parties, potentially revealing sensitive information. Workaround ========== If possible, disable the use of SSL 2.0 in all OpenSSL-enabled applications. Resolution ========== All OpenSSL users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose dev-libs/openssl References ========== [ 1 ] CAN-2005-2969 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2969 [ 2 ] OpenSSL security advisory http://www.openssl.org/news/secadv_20051011.txt Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200510-11.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 () gentoo org or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2005 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/2.0
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- [ GLSA 200510-11 ] OpenSSL: SSL 2.0 protocol rollback Thierry Carrez (Oct 12)