From koon@gentoo.org Wed Apr 13 14:16:46 2005 From: Thierry Carrez To: gentoo-announce@lists.gentoo.org Cc: full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com, security-alerts@linuxsecurity.com Date: Wed, 13 Apr 2005 20:10:07 +0200 Subject: [Full-disclosure] [ GLSA 200504-12 ] rsnapshot: Local privilege escalation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200504-12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: rsnapshot: Local privilege escalation Date: April 13, 2005 Bugs: #88681 ID: 200504-12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== rsnapshot allow a local user to take ownership of local files, resulting in privilege escalation. Background ========== rsnapshot is a filesystem snapshot utility based on rsync, allowing local and remote systems backups. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/rsnapshot < 1.2.1 >= 1.2.1 Description =========== The copy_symlink() subroutine in rsnapshot follows symlinks when changing file ownership, instead of changing the ownership of the symlink itself. Impact ====== Under certain circumstances, local attackers can exploit this vulnerability to take ownership of arbitrary files, resulting in local privilege escalation. Workaround ========== The copy_symlink() subroutine is not called if the cmd_cp parameter has been enabled. Resolution ========== All rsnapshot users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/rsnapshot-1.2.1" References ========== [ 1 ] rsnapshot Security Advisory 001 http://www.rsnapshot.org/security/2005/001.html Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200504-12.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 [ Part 1.2, "OpenPGP digital signature" Application/PGP-SIGNATURE ] [ 264bytes. ] [ Unable to print this part. ] [ Part 2: "Attached Text" ] _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/