- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200511-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: fetchmail: Password exposure in fetchmailconf Date: November 06, 2005 Bugs: #110366 ID: 200511-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== fetchmailconf fails to properly handle file permissions, temporarily exposing sensitive information to other local users. Background ========== fetchmail is a utility that retrieves and forwards mail from remote systems using IMAP, POP, and other protocols. It ships with fetchmailconf, a graphical utility used to create configuration files. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-mail/fetchmail < 6.2.5.2-r1 >= 6.2.5.2-r1 Description =========== Thomas Wolff discovered that fetchmailconf opens the configuration file with default permissions, writes the configuration to it, and only then restricts read permissions to the owner. Impact ====== A local attacker could exploit the race condition to retrieve sensitive information like IMAP/POP passwords. Workaround ========== Run "umask 077" to temporarily strengthen default permissions, then run "fetchmailconf" from the same shell. Resolution ========== All fetchmail users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/fetchmail-6.2.5.2-r1" References ========== [ 1 ] Fetchmail Security Advisory http://fetchmail.berlios.de/fetchmail-SA-2005-02.txt [ 2 ] CVE-2005-3088 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3088 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200511-06.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
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