[arch-security] [ASA-201603-14] pidgin-otr: arbitrary code execution

[Levente Polyak]

Arch Linux Security Advisory ASA-201603-14
==========================================

Severity: High
Date    : 2016-03-12
CVE-ID  : CVE-2015-8833
Package : pidgin-otr
Type    : arbitrary code execution
Remote  : Yes
Link    : https://wiki.archlinux.org/index.php/CVE

Summary
=======

The package pidgin-otr before version 4.0.2-1 is vulnerable to
use-after-free leading to denial of service or possible arbitrary code
execution.

Resolution
==========

Upgrade to 4.0.2-1.

# pacman -Syu "pidgin-otr>=4.0.2-1"

The problem has been fixed upstream in version 4.0.2.

Workaround
==========

None.

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

The pidgin-otr plugin fixes a heap use after free error. The bug is
triggered when a user tries to authenticate a buddy and happens in the
function create_smp_dialog. This issue is leading to denial of service
or possibly remote code execution.

Impact
======

A remote attacker is able to trigger a user-after-free during otr
authentication and possibly execute arbitrary code

References
==========

https://access.redhat.com/security/cve/CVE-2015-8833
http://seclists.org/oss-sec/2016/q1/572
https://bugs.otr.im/issues/88
https://bugs.archlinux.org/task/48537

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