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[ GLSA 200501-22 ] poppassd_pam: Unauthorized password changing
From: Thierry Carrez <koon () gentoo org>
Date: Tue, 11 Jan 2005 20:57:17 +0100
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200501-22 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: poppassd_pam: Unauthorized password changing Date: January 11, 2005 Bugs: #75820 ID: 200501-22 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== poppassd_pam allows anyone to change any user's password without authenticating the user first. Background ========== poppassd_pam is a PAM-enabled server for changing system passwords that can be used to change POP server passwords. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- net-mail/poppassd_ceti <= 1.0 >= 1.8.4 net-mail/poppassd_pam <= 1.0 Vulnerable! ------------------------------------------------------------------- Description =========== Gentoo Linux developer Marcus Hanwell discovered that poppassd_pam did not check that the old password was valid before changing passwords. Our investigation revealed that poppassd_pam did not call pam_authenticate before calling pam_chauthtok. Impact ====== A remote attacker could change the system password of any user, including root. This leads to a complete compromise of the POP accounts, and may also lead to a complete root compromise of the affected server, if it also provides shell access authenticated using system passwords. Workaround ========== There is no known workaround at this time. Resolution ========== All poppassd_pam users should migrate to the new package called poppassd_ceti: # emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/poppassd_ceti-1.8.4" Note: Portage will automatically replace the poppassd_pam package by the poppassd_ceti package. References ========== [ 1 ] CAN-2005-0002 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0002 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200501-22.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
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- [ GLSA 200501-22 ] poppassd_pam: Unauthorized password changing Thierry Carrez (Jan 11)