- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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@xxxxxxxxxx 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
Attachment:
signature.asc
Description: OpenPGP digital signature