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Gentoo: 200804-27 Moderate: SILC Client Denial Of Service Risks

Multiple vulnerabilities were found in SILC Client, Server, and Toolkit, allowing for Denial of Service and execution of arbitrary code. [More...]. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200804-27 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://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). * Avulnerability 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 https://www.cve.org/CVERecord?id=CVE-2008-1227 [ 2 ] CVE-2008-1429 https://www.cve.org/CVERecord?id=CVE-2008-1429 [ 3 ] CVE-2008-1552 https://www.cve.org/CVERecord?id=CVE-2008-1552 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200804-27 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 2008 Gentoo Foundation, Inc; referencedtext 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/2.5/ . SILC Platform, Agent, and Tools weaknesses lead to potential Denial of Service incidents. Update now to address the risks involved. Discover further details.. Gentoo Linux, Denial of Service, SILC Client, Security Advisory, Software Update. . LinuxSecurity.com Team

Apr 24, 2008 Gentoo