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Gentoo alert 200505-06 (tcpdump)

From:  Sune Kloppenborg Jeppesen <jaervosz@gentoo.org>
To:  gentoo-announce@lists.gentoo.org
Subject:  [gentoo-announce] [ GLSA 200505-06 ] TCPDump: Decoding routines Denial of Service vulnerability
Date:  Mon, 9 May 2005 21:31:51 +0200
Cc:  bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk, security-alerts@linuxsecurity.com

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200505-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: TCPDump: Decoding routines Denial of Service vulnerability Date: May 09, 2005 Bugs: #90541 ID: 200505-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A flaw in the decoding of network packets renders TCPDump vulnerable to a remote Denial of Service attack. Background ========== TCPDump is a tool for network monitoring and data acquisition. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-analyzer/tcpdump < 3.8.3-r2 >= 3.8.3-r2 Description =========== TCPDump improperly handles and decodes ISIS, BGP, LDP (CAN-2005-1279) and RSVP (CAN-2005-1280) packets. TCPDump might loop endlessly after receiving malformed packets. Impact ====== A malicious remote attacker can exploit the decoding issues for a Denial of Service attack by sending specially crafted packets, possibly causing TCPDump to loop endlessly. Workaround ========== There is no known workaround at this time. Resolution ========== All TCPDump users should upgrade to the latest available version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-analyzer/tcpdump-3.8.3-r2" References ========== [ 1 ] CAN-2005-1279 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1279 [ 2 ] CAN-2005-1280 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1280 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200505-06.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 2005 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/2.0


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