Cyrus-SASL: DIGEST-MD5 Pre-Authentication Denial of Service

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200604-09 / cyrus-sasl
Release Date	April 21, 2006
Latest Revision	April 21, 2006: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-libs/cyrus-sasl	< 2.1.21-r2	>= 2.1.21-r2	All supported architectures

Related bugreports: #129523

Synopsis

Cyrus-SASL contains a vulnerability in the DIGEST-MD5 process that could lead to a Denial of Service.

2. Impact Information

Background

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

Description

Cyrus-SASL contains an unspecified vulnerability in the DIGEST-MD5 process that could lead to a Denial of Service.

Impact

An attacker could possibly exploit this vulnerability by sending specially crafted data stream to the Cyrus-SASL server, resulting in a Denial of Service even if the attacker is not able to authenticate.

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-2.1.21-r2"

4. References

CVE-2006-1721

Updated April 21, 2006

Summary: This is a Gentoo Linux Security Advisory

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