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Cyrus-SASL: Denial of Service

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201309-01 / cyrus-sasl
Release Date September 01, 2013
Latest Revision September 01, 2013: 1
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
dev-libs/cyrus-sasl < 2.1.26-r3 >= 2.1.26-r3 All supported architectures

Related bugreports: #476764

Synopsis

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

2.  Impact Information

Background

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

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.

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-2.1.26-r3"

4.  References



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Page updated September 01, 2013

Summary: This is a Gentoo Linux Security Advisory

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