CVE-2003-0138 Auth bypass in n/a

High 7.5 Published 21 Mar 2003 Updated 8 Aug 2024

Attackers can impersonate any principal in a Kerberos realm via a chosen-plaintext attack, leading to unauthorized access and privilege escalation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2003-0138?

CVE-2003-0138 is a high-severity authentication bypass vulnerability in n/a, published on 21 Mar 2003. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Version 4 of the Kerberos protocol (krb4), as used in Heimdal and other packages, allows an attacker to impersonate any principal in a realm via a chosen-plaintext attack.

Which versions are affected by CVE-2003-0138?

It affects 1 product.

Products include Mit Kerberos.

How do I fix CVE-2003-0138?

Upgrade to a fixed version.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2003-0138 being exploited?

There is no known exploitation of CVE-2003-0138 in the wild and no public exploit code.

Sources

Also known as CVE-2003-0157, DEBIAN-CVE-2003-0138, DSA-269, GHSA-qxpj-m267-3648.