[ GLSA 201309-01 ] Cyrus-SASL: Denial of Service

[GLSA]

Gentoo Linux Security Advisory

Title: Cyrus-SASL: Denial of Service (GLSA 201309-01)
Severity: normal
Exploitable: remote
Date: September 01, 2013
Bug(s): #476764
ID: 201309-01

Synopsis

A NULL pointer dereference in Cyrus-SASL may allow remote attackers
to cause a Denial of Service condition.


Background

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


Affected Packages

Package: dev-libs/cyrus-sasl
Vulnerable: < 2.1.26-r3
Unaffected: >= 2.1.26-r3
Architectures: All supported architectures


Description

In the GNU C Library (glibc) from version 2.17 onwards, the crypt()
function call can return NULL when the salt violates specifications or
the system is in FIPS-140 mode and a DES or MD5 hashed password is
passed. When Cyrus-SASL’s authentication mechanisms call crypt(), a
NULL may be returned.


Impact

A remote attacker could trigger this vulnerability to cause a Denial of
Service condition.


Workaround

There is no known workaround at this time.

Resolution

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