CVE-2003-0139 Auth bypass in n/a

High 7.5 Published 21 Mar 2003 Updated 8 Aug 2024

Attackers can forge Kerberos tickets via cut-and-paste attacks when triple-DES keys are used, allowing unauthorized access to services.

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

What is CVE-2003-0139?

CVE-2003-0139 is a high-severity authentication bypass vulnerability in n/a, published on 21 Mar 2003. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Certain weaknesses in the implementation of version 4 of the Kerberos protocol (krb4) in the krb5 distribution, when triple-DES keys are used to key krb4 services, allow an attacker to create krb4 tickets for unauthorized principals using a cut-and-paste attack and "ticket splicing."

Which versions are affected by CVE-2003-0139?

It affects 1 product.

Products include Mit Kerberos.

How do I fix CVE-2003-0139?

Apply the vendor's patch.

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

Is CVE-2003-0139 being exploited?

There is no known exploitation of CVE-2003-0139 in the wild and no public exploit code.

Sources

Also known as CVE-2003-0158, DEBIAN-CVE-2003-0139, GHSA-h6r9-m8w5-h766.