From koon@gentoo.org Sat Oct 9 17:43:13 2004 From: Thierry Carrez To: gentoo-announce@lists.gentoo.org Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com, security-alerts@linuxsecurity.com Date: Sat, 09 Oct 2004 20:26:24 +0200 Subject: [Full-Disclosure] [ GLSA 200410-08 ] ncompress: Buffer overflow - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200410-08 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: ncompress: Buffer overflow Date: October 09, 2004 Bugs: #66251 ID: 200410-08 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== compress and uncompress, which could be used by daemon programs, contain a buffer overflow that could lead to remote execution of arbitrary code with the rights of the daemon process. Background ========== ncompress is a utility handling compression and decompression of Lempel-Ziv archives, compatible with the original *nix compress and uncompress utilities (.Z extensions). Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-arch/ncompress <= 4.2.4 >= 4.2.4-r1 Description =========== compress and uncompress do not properly check bounds on command line options, including the filename. Large parameters would trigger a buffer overflow. Impact ====== By supplying a carefully crafted filename or other option, an attacker could execute arbitrary code on the system. A local attacker could only execute code with his own rights, but since compress and uncompress are called by various daemon programs, this might also allow a remote attacker to execute code with the rights of the daemon making use of ncompress. Workaround ========== There is no known workaround at this time. Resolution ========== All ncompress users should upgrade to the latest version: # emerge sync # emerge -pv ">=app-arch/ncompress-4.2.4-r1" # emerge ">=app-arch/ncompress-4.2.4-r1" References ========== [ 1 ] US-CERT Vulnerability Note VU#176363 http://www.kb.cert.org/vuls/id/176363 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200410-08.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 2004 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/1.0 [ Part 2, "OpenPGP digital signature" Application/PGP-SIGNATURE ] [ 264bytes. ] [ Unable to print this part. ]