- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200804-27 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: SILC: Multiple vulnerabilities Date: April 24, 2008 Bugs: #212362, #214116, #214812 ID: 200804-27 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities were found in SILC Client, Server, and Toolkit, allowing for Denial of Service and execution of arbitrary code. Background ========== SILC (Secure Internet Live Conferencing protocol) Toolkit is a software development kit for use in clients, SILC Server is a communication server, and SILC Client is an IRSSI-based text client. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-im/silc-toolkit < 1.1.7 >= 1.1.7 2 net-im/silc-client < 1.1.4 >= 1.1.4 3 net-im/silc-server < 1.1.2 >= 1.1.2 ------------------------------------------------------------------- 3 affected packages on all of their supported architectures. ------------------------------------------------------------------- Description =========== * Nathan G. Grennan reported a boundary error in SILC Toolkit within the silc_fingerprint() function in the file lib/silcutil/silcutil.c when passing overly long data, resulting in a stack-based buffer overflow (CVE-2008-1227). * A vulnerability has been reported in SILC Server which is caused due to an error in the handling of "NEW_CLIENT" packets that do not contain a nickname (CVE-2008-1429). * Ariel Waissbein, Pedro Varangot, Martin Mizrahi, Oren Isacson, Carlos Garcia, and Ivan Arce of Core Security Technologies reported that SILC Client, Server, and Toolkit contain a vulnerability in the silc_pkcs1_decode() function in the silccrypt library (silcpkcs1.c), resulting in an integer underflow, signedness error, and a buffer overflow (CVE-2008-1552). Impact ====== A remote attacker could exploit these vulnerabilities to cause a Denial of Service or execute arbitrary code with the privileges of the user running the application. Workaround ========== There is no known workaround at this time. Resolution ========== All SILC Toolkit users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-im/silc-toolkit-1.1.7" All SILC Client users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-im/silc-client-1.1.4" All SILC Server users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-im/silc-server-1.1.2" References ========== [ 1 ] CVE-2008-1227 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1227 [ 2 ] CVE-2008-1429 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1429 [ 3 ] CVE-2008-1552 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1552 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200804-27.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 2008 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