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Gentoo alert 200606-02 (shadow)

From:  Sune Kloppenborg Jeppesen <jaervosz@gentoo.org>
To:  gentoo-announce@lists.gentoo.org
Subject:  [gentoo-announce] [ GLSA 200606-02 ] shadow: Privilege escalation
Date:  Wed, 7 Jun 2006 16:15:50 +0200
Cc:  bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk, security-alerts@linuxsecurity.com

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200606-02 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: shadow: Privilege escalation Date: June 07, 2006 Bugs: #133615 ID: 200606-02 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A security issue in shadow allows a local user to perform certain actions with escalated privileges. Background ========== shadow provides a set of utilities to deal with user accounts. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-apps/shadow < 4.0.15-r2 >= 4.0.15-r2 Description =========== When the mailbox is created in useradd, the "open()" function does not receive the three arguments it expects while O_CREAT is present, which leads to random permissions on the created file, before fchmod() is executed. Impact ====== Depending on the random permissions given to the mailbox file which is at this time owned by root, a local user may be able to open this file for reading or writing, or even executing it, maybe as the root user. Workaround ========== There is no known workaround at this time. Resolution ========== All shadow users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.0.15-r2" References ========== [ 1 ] CVE-2006-1174 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1174 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200606-02.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


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