===================================================================== CERT-Renater Note d'Information No. 2005/VULN450 _____________________________________________________________________ DATE : 26/07/2005 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running fetchmail. ====================================================================== - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200507-21 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: fetchmail: Buffer Overflow Date: July 25, 2005 Bugs: #99865 ID: 200507-21 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== fetchmail is susceptible to a buffer overflow resulting in a Denial of Service or arbitrary code execution. Background ========== fetchmail is a utility that retrieves and forwards mail from remote systems using IMAP, POP, and other protocols. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-mail/fetchmail < 6.2.5.2 >= 6.2.5.2 Description =========== fetchmail does not properly validate UIDs coming from a POP3 mail server. The UID is placed in a fixed length buffer on the stack, which can be overflown. Impact ====== Very long UIDs returned from a malicious or compromised POP3 server can cause fetchmail to crash, resulting in a Denial of Service, or allow arbitrary code to be placed on the stack. Workaround ========== There are no known workarounds at this time. Resolution ========== All fetchmail users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/fetchmail-6.2.5.2" References ========== [ 1 ] Fetchmail Security Advisory http://fetchmail.berlios.de/fetchmail-SA-2005-01.txt [ 2 ] CAN-2005-2335 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2335 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200507-21.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 at 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 -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: not available Url : http://lists.grok.org.uk/pipermail/full-disclosure/attachments/20050725/ab4e3e0f/attachment.bin ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================