[ GLSA 200508-22 ] pam_ldap: Authentication bypass vulnerability

[GLSA]

Gentoo Linux Security Advisory

Title: pam_ldap: Authentication bypass vulnerability (GLSA 200508-22)
Severity: normal
Exploitable: remote
Date: August 31, 2005
Bug(s): #103659
ID: 200508-22

Synopsis

pam_ldap contains a vulnerability that may allow a remote attacker to gain system access.

Background

pam_ldap is a Pluggable Authentication Module which allows authentication against LDAP directories.

Affected Packages

Package: sys-auth/pam_ldap
Vulnerable: < 180
Unaffected: >= 180
Architectures: All supported architectures


Description

When a pam_ldap client attempts to authenticate against an LDAP server that omits the optional error value from the PasswordPolicyResponseValue, the authentication attempt will always succeed.

Impact

A remote attacker may exploit this vulnerability to bypass the LDAP authentication mechanism, gaining access to the system possibly with elevated privileges.

Workaround

There is no known workaround at this time.

Resolution

All pam_ldap users should upgrade to the latest version: