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Gentoo Linux Security Advisory GLSA 200507-21
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http://security.gentoo.org/
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Severity: Normal
Title: fetchmail: Buffer Overflow
Date: July 25, 2005
Bugs: #99865
ID: 200507-21
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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@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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