[ GLSA 200711-33 ] nss_ldap: Information disclosure

2007-11-2600:00:00

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Gentoo Linux Security Advisory GLSA 200711-33

                                        http://security.gentoo.org/

Severity: Low
Title: nss_ldap: Information disclosure
Date: November 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
-------------------------------------------------------------------

1 sys-auth/nss_ldap < 258 >= 258

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 &quot;&gt;=sys-auth/nss_ldap-258&quot;

References

[ 1 ] CVE-2007-5794
http://cve.mitre.org/cgi-bin/cvename.cgi?name=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
[email protected] or alternatively, you may file a bug at
http://bugs.gentoo.org.