- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200905-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: GnuTLS: Multiple vulnerabilities Date: May 24, 2009 Bugs: #267774 ID: 200905-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities in GnuTLS might result in a Denial of Service, spoofing or the generation of invalid keys. Background ========== GnuTLS is an Open Source implementation of the TLS 1.0 and SSL 3.0 protocols. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-libs/gnutls < 2.6.6 >= 2.6.6 Description =========== The following vulnerabilities were found in GnuTLS: * Miroslav Kratochvil reported that lib/pk-libgcrypt.c does not properly handle corrupt DSA signatures, possibly leading to a double-free vulnerability (CVE-2009-1415). * Simon Josefsson reported that GnuTLS generates RSA keys stored in DSA structures when creating a DSA key (CVE-2009-1416). * Romain Francoise reported that the _gnutls_x509_verify_certificate() function in lib/x509/verify.c does not perform time checks, resulting in the "gnutls-cli" program accepting X.509 certificates with validity times in the past or future (CVE-2009-1417). Impact ====== A remote attacker could entice a user or automated system to process a specially crafted DSA certificate, possibly resulting in a Denial of Service condition. NOTE: This issue might have other unspecified impact including the execution of arbitrary code. Furthermore, a remote attacker could spoof signatures on certificates and the "gnutls-cli" application can be tricked into accepting an invalid certificate. 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-2.6.6" References ========== [ 1 ] CVE-2009-1415 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1415 [ 2 ] CVE-2009-1416 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1416 [ 3 ] CVE-2009-1417 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1417 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200905-04.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 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
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