- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200411-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Low Title: shadow: Unauthorized modification of account information Date: November 04, 2004 Bugs: #69212 ID: 200411-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A flaw in the chfn and chsh utilities might allow modification of account properties by unauthorized users. Background ========== shadow provides a set of utilities to deal with user accounts. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 sys-apps/shadow < 4.0.5-r1 >= 4.0.5-r1 Description =========== Martin Schulze reported a flaw in the passwd_check() function in "libmisc/pwdcheck.c" which is used by chfn and chsh. Impact ====== A local attacker may be able to use chfn and chsh to change the standard shell of other users or modify their GECOS information (full name, phone number...). 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-4.0.5-r1" References ========== [ 1 ] shadow NEWS file http://ftp.pld.org.pl/software/shadow/NEWS Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200411-09.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@xxxxxxxxxx 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
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