--bKyqfOwhbdpXa4YI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200610-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Asterisk: Multiple vulnerabilities Date: October 30, 2006 Bugs: #144941, #151881 ID: 200610-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Asterisk is vulnerable to the remote execution of arbitrary code or a Denial of Service. Background ========== Asterisk is an open source implementation of a telephone private branch exchange (PBX). Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/asterisk < 1.2.13 >= 1.2.13 Description =========== Asterisk contains buffer overflows in channels/chan_mgcp.c from the MGCP driver and in channels/chan_skinny.c from the Skinny channel driver for Cisco SCCP phones. It also dangerously handles client-controlled variables to determine filenames in the Record() function. Finally, the SIP channel driver in channels/chan_sip.c could use more resources than necessary under unspecified circumstances. Impact ====== A remote attacker could execute arbitrary code by sending a crafted audit endpoint (AUEP) response, by sending an overly large Skinny packet even before authentication, or by making use of format strings specifiers through the client-controlled variables. An attacker could also cause a Denial of Service by resource consumption through the SIP channel driver. Workaround ========== There is no known workaround for the format strings vulnerability at this time. You can comment the lines in /etc/asterisk/mgcp.conf, /etc/asterisk/skinny.conf and /etc/asterisk/sip.conf to deactivate the three vulnerable channel drivers. Please note that the MGCP channel driver is disabled by default. Resolution ========== All Asterisk users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.13" References ========== [ 1 ] CVE-2006-4345 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4345 [ 2 ] CVE-2006-4346 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4346 [ 3 ] CVE-2006-5444 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5444 [ 4 ] CVE-2006-5445 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5445 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200610-15.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 2006 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 --bKyqfOwhbdpXa4YI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFFRj5GIS4GNEW6wBQRAuD8AJ9rIQp3KqgLLhjQ3xPKT9cbaiTBmACgkFkN dVNsmsVoPkuKcSUcV3b92vI= =Ymu+ -----END PGP SIGNATURE----- --bKyqfOwhbdpXa4YI--