Debian DSA-1943-1 Critical: OpenLDAP SSL Certificate Spoofing

Packages : openldap openldap2.3
Vulnerability : insufficient input validation
Problem type : remote
Debian-specific: no
Debian bug : 553432
CVE ID : CVE-2009-3767

It was discovered that OpenLDAP, a free implementation of the Lightweight
Directory Access Protocol, when OpenSSL is used, does not properly handle a '\0'
character in a domain name in the subject's Common Name (CN) field of an X.509
certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL
servers via a crafted certificate issued by a legitimate Certification Authority.

For the oldstable distribution (etch), this problem has been fixed in version
2.3.30-5+etch3 for openldap2.3.

For the stable distribution (lenny), this problem has been fixed in version
2.4.11-1+lenny1 for openldap.

For the testing distribution (squeeze), and the unstable distribution (sid),
this problem has been fixed in version 2.4.17-2.1 for openldap.


We recommend that you upgrade your openldap2.3/openldap packages.

Upgrade instru...