GLSA 200711-33: nss_ldap: Information disclosure

http://security.gentoo.org/

Severity:	low
Title:	nss_ldap: Information disclosure
Date:	11/25/2007
Bugs:	#198390
ID:	200711-33

Synopsis

A race condition might lead to theft of user credentials or information disclosure in services using nss_ldap.

Background

nss_ldap is a Name Service Switch module which allows 'passwd', 'group' and 'host' database information to be pulled from LDAP.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
sys-auth/nss_ldap	< 258	>= 258	All supported architectures

Description

Josh Burley reported that nss_ldap does not properly handle the LDAP connections due to a race condition that can be triggered by multi-threaded applications using nss_ldap, which might lead to requested data being returned to a wrong process.

Impact

Remote attackers could exploit this race condition by sending queries to a vulnerable server using nss_ldap, possibly leading to theft of user credentials or information disclosure (e.g. Dovecot returning wrong mailbox contents).

Workaround

There is no known workaround at this time.

Resolution

All nss_ldap users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-auth/nss_ldap-258"

References

CVE-2007-5794

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200711-33.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.