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Date: Wed, 14 Jan 2009 23:49:12 +0100 From: Pierre-Yves Rofes <py@gentoo.org.> To: gentoo-announce@gentoo.org Subject: [ GLSA 200901-10 ] GnuTLS: Certificate validation error X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: antivirus-gw at tyumen.ru -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200901-10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~ http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~ Severity: Normal ~ Title: GnuTLS: Certificate validation error ~ Date: January 14, 2009 ~ Bugs: #245850 ~ ID: 200901-10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A certificate validation error in GnuTLS might allow for spoofing attacks. Background ========== GnuTLS is an open-source implementation of TLS 1.0 and SSL 3.0. Affected packages ================= ~ ------------------------------------------------------------------- ~ Package / Vulnerable / Unaffected ~ ------------------------------------------------------------------- ~ 1 net-libs/gnutls < 2.4.1-r2 >= 2.4.1-r2 Description =========== Martin von Gagern reported that the _gnutls_x509_verify_certificate() function in lib/x509/verify.c trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate. Impact ====== A remote attacker could exploit this vulnerability and spoof arbitrary names to conduct Man-In-The-Middle attacks and intercept sensitive information. Workaround ========== There is no known workaround at this time. Resolution ========== All GnuTLS users should upgrade to the latest version: ~ # emerge --sync ~ # emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.4.1-r2" References ========== ~ [ 1 ] CVE-2008-4989 ~ http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4989 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: ~ http://security.gentoo.org/glsa/glsa-200901-10.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 2009 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 SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAklua+gACgkQuhJ+ozIKI5g1tgCeOEvV3MYts1IzizHmO2PMPtlo jdcAn3Vv3VNJ2TKSHE0FyPS7hBrsIcdv =ySwo -----END PGP SIGNATURE-----
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