Multiple Vulnerabilities in pwlib

Background

pwlib is a multi-platform library designed for OpenH323.

Description

Multiple vulnerabilities have been found in the implimentation of protocol H.323 contained in pwlib. Most of the vulnerabilies are in the parsing of ASN.1 elements which would allow an attacker to use a maliciously crafted ASN.1 element to cause unpredictable behavior in pwlib.

Impact

An attacker may cause a denial of service condition or cause a buffer overflow that would allow arbitrary code to be executed with root privileges.

Workaround

Blocking ports 1719 and 1720 may reduce the likelihood of an attack. All users are advised to upgrade to the latest version of the affected package.

Resolution

All pwlib users are advised to upgrade to version 1.5.2-r3 or later:

 # emerge sync

 # emerge -pv ">=dev-libs/pwlib-1.5.2-r3"
 # emerge ">=dev-libs/pwlib-1.5.2-r3"