Cyrus-SASL: Execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200907-09 / cyrus-sasl
Release Date	July 12, 2009
Latest Revision	July 12, 2009: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-libs/cyrus-sasl	< 2.1.23	>= 2.1.23	All supported architectures

Related bugreports: #270261

Synopsis

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

2. Impact Information

Background

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

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.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

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

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/cyrus-sasl-2.1.23"

4. References

CVE-2009-0688

Page updated July 12, 2009

Summary: This is a Gentoo Linux Security Advisory

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