From lewk@gentoo.org Mon Dec 6 23:39:48 2004 From: Luke Macken To: gentoo-announce@gentoo.org Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com, security-alerts@linuxsecurity.com Date: Mon, 6 Dec 2004 22:48:29 -0500 Subject: [Full-Disclosure] [ GLSA 200412-04 ] Perl: Insecure temporary file creation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200412-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Perl: Insecure temporary file creation Date: December 07, 2004 Bugs: #66360 ID: 200412-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Perl is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files. Background ========== Perl is a stable, cross-platform programming language created by Larry Wall. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-lang/perl < 5.8.5-r2 *>= 5.8.5-r2 >= 5.8.6-r1 dev-lang/perl == 5.8.6 *>= 5.8.5-r2 >= 5.8.6-r1 Description =========== Some Perl modules create temporary files in world-writable directories with predictable names. Impact ====== A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When a Perl script is executed, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user. Workaround ========== There is no known workaround at this time. Resolution ========== All Perl users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=perl-5.8.5-r2" References ========== [ 1 ] CAN-2004-0976 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0976 [ 2 ] Trustix Advisory #2004-0050 http://www.trustix.org/errata/2004/0050/ Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200412-04.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/2.0 [ Part 2, Application/PGP-SIGNATURE 196bytes. ] [ Unable to print this part. ]