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Gentoo: GLSA 200510-11 Low Severity: OpenSSL SSL 2.0 Rollback Risk

When using a specific option, OpenSSL can be forced to fallback to the less secure SSL 2.0 protocol.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200510-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://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 allOpenSSL-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 https://www.cve.org/CVERecord?id=CAN-2005-2969 [ 2 ] OpenSSL security advisory Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200510-11 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 This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://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. https://creativecommons.org/licenses/by-sa/2.0/ . Gentoo advisory GLSA 200510-12 highlights a minor vulnerability in the handling of SSL 2.0 in the OpenSSL library. Recommended actions for users are included.. Gentoo Linux Security, OpenSSL Risk, SSL Protocol Advisory. . Severity: Low. LinuxSecurity.com Team

Oct 12, 2005 •Low Gentoo