[ 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: