[ GLSA 200907-09 ] Cyrus-SASL: Execution of arbitrary code

[GLSA]

Gentoo Linux Security Advisory

Title: Cyrus-SASL: Execution of arbitrary code (GLSA 200907-09)
Severity: high
Exploitable: remote
Date: July 12, 2009
Bug(s): #270261
ID: 200907-09

Synopsis

A buffer overflow in Cyrus-SASL might allow for the execution of arbitrary code in applications or daemons that authenticate using SASL.

Background

Cyrus-SASL is an implementation of the Simple Authentication and Security Layer.

Affected Packages

Package: dev-libs/cyrus-sasl
Vulnerable: < 2.1.23
Unaffected: >= 2.1.23
Architectures: All supported architectures


Description

James Ralston reported that in certain situations, Cyrus-SASL does not properly terminate strings which can result in buffer overflows when performing Base64 encoding.

Impact

A remote unauthenticated user might send specially crafted packets to a daemon using Cyrus-SASL, possibly resulting in the execution of arbitrary code with the privileges of the user running the daemon or a Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All Cyrus-SASL users should upgrade to the latest version: