Arch Linux: ASA-202305-1 Critical: Weechat Memory Leak Vulnerability

Arch Linux Security Advisory ASA-201704-7
========================================
Severity: High
Date    : 2017-04-23
CVE-ID  : CVE-2017-8073
Package : weechat
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-253

Summary
======
The package weechat before version 1.7.1-1 is vulnerable to denial of
service.

Resolution
=========
Upgrade to 1.7.1-1.

# pacman -Syu "weechat>=1.7.1-1"

The problem has been fixed upstream in version 1.7.1.

Workaround
=========
Use the following workaround for weechat>=1.1:
 /trigger add irc_dcc_quotes modifier "irc_in_privmsg" "${arguments} \
=~ ^[^ ]+ :${\x01}DCC SEND ${\x22} " "/.*//"

Description
==========
WeeChat before 1.7.1 allows a remote crash by sending a filename via
DCC to the IRC plugin. This occurs in the
irc_ctcp_dcc_filename_without_quotes function during quote removal,
which results in a buffer overflow.

Impact
=====
A remote attacker is able to crash the application via a maliciously
crafted DCC-request.

References
=========
https://weechat.org/doc/weechat/security/
https://github.com/weechat/weechat/commit/2fb346f25f79e412cf0ed314fdf791763c19b70b
https://security.archlinux.org/CVE-2017-8073