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[ GLSA 201309-01 ] Cyrus-SASL: Denial of Service
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PostPosted: Sun Sep 01, 2013 8:26 pm    Post subject: [ GLSA 201309-01 ] Cyrus-SASL: Denial of Service Reply with quote

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:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/cyrus-sasl-2.1.26-r3"
   


References

CVE-2013-4122
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