Arch Linux ASA-201505-16 Medium: Pgbouncer Denial Of Service

Arch Linux Security Advisory ASA-201505-16
=========================================
Severity: Medium
Date    : 2015-05-26
CVE-ID  : CVE-2015-4054
Package : pgbouncer
Type    : denial of service
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package pgbouncer before version 1.5.5-1 is vulnerable to denial of
service.

Resolution
=========
Upgrade to 1.5.5-1.

# pacman -Syu "pgbouncer>=1.5.5-1"

The problem has been fixed upstream in version 1.5.5.

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

Description
==========
A remote denial of service vulnerability in check_client_passwd() has
been discovered. The issue is triggered if a password packet appears
before the startup packet. In such case a null pointer is dereferenced
that is leading to application crash.

Impact
=====
A remote attacker is able to send specially crafted packets that is
leading to application crash resulting in denial of service.

References
=========
https://www.openwall.com/lists/oss-security/2015/05/21/2
https://access.redhat.com/security/cve/CVE-2015-4054
https://github.com/pgbouncer/pgbouncer/issues/42