Subject: [ASA-201703-17] irssi: arbitrary code execution

Arch Linux Security Advisory ASA-201703-17
==========================================

Severity: High
Date    : 2017-03-21
CVE-ID  : CVE-2017-7191
Package : irssi
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-224

Summary
=======

The package irssi before version 1.0.2-1 is vulnerable to arbitrary
code execution.

Resolution
==========

Upgrade to 1.0.2-1.

# pacman -Syu "irssi>=1.0.2-1"

The problem has been fixed upstream in version 1.0.2.

Workaround
==========

None.

Description
===========

A use after free vulnerability has been discovered in irssi < 1.0.2
while producing a list of netjoins that can result in arbitrary code
execution.

Impact
======

A malicious attacker is able to crash the irssi process or execute
arbitrary code on the host by forcing a server disconnection during a
netsplit.

References
==========

https://irssi.org/security/irssi_sa_2017_03.txt
https://security.archlinux.org/CVE-2017-7191