CVE-2016-2126 Privilege escalation in n/a

Medium 6.5 Published 11 May 2017 Updated 5 Aug 2024

A remote authenticated attacker can crash winbindd or cache elevated permissions via incorrect PAC checksum handling in Samba.

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-2016-2126?

CVE-2016-2126 is a medium-severity vulnerability in Samba Samba, published on 11 May 2017. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.

Weakness: CWE-264

Which versions are affected by CVE-2016-2126?

It affects 1 product.

Products include Samba Samba.

How do I fix CVE-2016-2126?

Apply the vendor's patch.

Is CVE-2016-2126 being exploited?

There is no known exploitation of CVE-2016-2126 in the wild and no public exploit code.

All Samba Samba vulnerabilities

Sources

Also known as ALPINE-CVE-2016-2126, DEBIAN-CVE-2016-2126, ECHO-39fb-5f45-96a2, GHSA-j88p-975v-5qqh, UBUNTU-CVE-2016-2126.