CVE-2014-5355 Null dereference in n/a

Medium 5.0 Published 20 Feb 2015 Updated 6 Aug 2024

Remote attackers can cause a denial of service in MIT Kerberos 5 via malformed version strings, affecting authentication services.

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

What is CVE-2014-5355?

CVE-2014-5355 is a medium-severity vulnerability in Mit Kerberos 5, published on 20 Feb 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

MIT Kerberos 5 (aka krb5) through 1.13.1 incorrectly expects that a krb5_read_message data field is represented as a string ending with a '\0' character, which allows remote attackers to (1) cause a denial of service (NULL pointer dereference) via a zero-byte version string or (2) cause a denial of service (out-of-bounds read) by omitting the '\0' character, related to appl/user_user/server.c and lib/krb5/krb/recvauth.c.

Which versions are affected by CVE-2014-5355?

It affects 1 product.

Products include Mit Kerberos 5.

How do I fix CVE-2014-5355?

Upgrade to a fixed version.

Is CVE-2014-5355 being exploited?

There is no known exploitation of CVE-2014-5355 in the wild and no public exploit code.

All Mit Kerberos 5 vulnerabilities

Sources

Also known as DEBIAN-CVE-2014-5355, GHSA-cmh6-3x5j-qf2g, MGASA-2015-0119, UBUNTU-CVE-2014-5355.