[ GLSA 200711-33 ] nss_ldap: Information disclosure

[GLSA]

Gentoo Linux Security Advisory

Title: nss_ldap: Information disclosure (GLSA 200711-33)
Severity: low
Exploitable: remote
Date: November 25, 2007
Bug(s): #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: sys-auth/nss_ldap
Vulnerable: < 258
Unaffected: >= 258
Architectures: 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: