Subject: [ASA-201901-8] irssi: denial of service

Arch Linux Security Advisory ASA-201901-8
=========================================

Severity: Low
Date    : 2019-01-11
CVE-ID  : CVE-2019-5882
Package : irssi
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-847

Summary
=======

The package irssi before version 1.1.2-1 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 1.1.2-1.

# pacman -Syu "irssi>=1.1.2-1"

The problem has been fixed upstream in version 1.1.2.

Workaround
==========

If lines are never hidden (no usage of /window hidelevel), this bug
will not trigger.

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

A use-after-free vulnerability has been found in irssi before 1.1.2,
when hidden lines were expired from the scroll buffer.

Impact
======

Irssi can crash when hidden lines are expired from the scroll buffer.

References
==========

https://marc.info/?l=oss-security&m=154711952322177
https://irssi.org/security/irssi_sa_2019_01.txt
https://github.com/irssi/irssi/pull/948
https://security.archlinux.org/CVE-2019-5882