CVE-2009-0887 Integer overflow in n/a

Medium 6.6 Published 12 Mar 2009 Updated 7 Aug 2024

Remote attackers can cause denial of service or gain unauthorized login access via integer signedness errors in Linux-PAM when non-ASCII usernames are used.

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-2009-0887?

CVE-2009-0887 is a medium-severity vulnerability in n/a, published on 12 Mar 2009. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Integer signedness error in the _pam_StrTok function in libpam/pam_misc.c in Linux-PAM (aka pam) 1.0.3 and earlier, when a configuration file contains non-ASCII usernames, might allow remote attackers to cause a denial of service, and might allow remote authenticated users to obtain login access with a different user's non-ASCII username, via a login attempt.

Weakness: CWE-189

Which versions are affected by CVE-2009-0887?

It affects 1 product.

Products include Linux-Pam Linux-Pam.

How do I fix CVE-2009-0887?

Upgrade to a fixed version.

Is CVE-2009-0887 being exploited?

There is no known exploitation of CVE-2009-0887 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2009-0887, GHSA-p45g-44mp-mq74.