Arch Linux ASA-201503-6 Medium: Mutt Denial Of Service Threat

Arch Linux Security Advisory ASA-201503-6
========================================
Severity: Medium
Date    : 2015-03-09
CVE-ID  : CVE-2014-9116
Package : mutt
Type    : denial of service
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package mutt before version 1.5.23-2 is vulnerable to denial of service.

Resolution
=========
Upgrade to 1.5.23-2.

# pacman -Syu "mutt>=1.5.23-2"

The problem has been fixed upstream but no release is available yet.

Workaround
=========
None.

Description
==========
The write_one_header function does not properly handle newline
characters at the beginning of a header, which allows remote attackers
to cause a denial of service (crash) via a header with an empty body,
which triggers a heap-based buffer overflow in the mutt_substrdup function.

Impact
=====
A remote attacker is able to send mails with specially crafted headers
that leads to a crash resulting in denial of service.

References
=========
https://seclists.org/oss-sec/2014/q4/835
https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-9116
https://bugs.archlinux.org/task/44110