CVE-2012-0862 Auth bypass in n/a

Medium 4.3 Published 4 Jun 2012 Updated 6 Aug 2024

Remote attackers can bypass access restrictions and expose enabled services by sending requests to the tcpmux port when the tcpmux-server service is enabled.

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

What is CVE-2012-0862?

CVE-2012-0862 is a medium-severity authentication bypass vulnerability in n/a, published on 4 Jun 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

builtins.c in Xinetd before 2.3.15 does not check the service type when the tcpmux-server service is enabled, which exposes all enabled services and allows remote attackers to bypass intended access restrictions via a request to tcpmux port 1.

Weakness: CWE-20

Which versions are affected by CVE-2012-0862?

It affects 1 product.

Linux distribution packages (12)

`xinetd` Red Hat:enterprise_linux:5::client	All versions	`2:2.3.14-19.el5`
`xinetd-debuginfo` Red Hat:enterprise_linux:5::client	All versions	`2:2.3.14-19.el5`
`xinetd` Red Hat:enterprise_linux:5::server	All versions	`2:2.3.14-19.el5`
`xinetd-debuginfo` Red Hat:enterprise_linux:5::server	All versions	`2:2.3.14-19.el5`
`xinetd` Red Hat:enterprise_linux:6::client	All versions	`2:2.3.14-38.el6`
`xinetd-debuginfo` Red Hat:enterprise_linux:6::client	All versions	`2:2.3.14-38.el6`
`xinetd` Red Hat:enterprise_linux:6::computenode	All versions	`2:2.3.14-38.el6`
`xinetd-debuginfo` Red Hat:enterprise_linux:6::computenode	All versions	`2:2.3.14-38.el6`
`xinetd` Red Hat:enterprise_linux:6::server	All versions	`2:2.3.14-38.el6`
`xinetd-debuginfo` Red Hat:enterprise_linux:6::server	All versions	`2:2.3.14-38.el6`
`xinetd` Red Hat:enterprise_linux:6::workstation	All versions	`2:2.3.14-38.el6`
`xinetd-debuginfo` Red Hat:enterprise_linux:6::workstation	All versions	`2:2.3.14-38.el6`

Products include Xinetd Xinetd.

How do I fix CVE-2012-0862?

Upgrade to a fixed version.

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

Is CVE-2012-0862 being exploited?

There is no known exploitation of CVE-2012-0862 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2012-0862, GHSA-mv4c-6fpc-r32q, RHSA-2013:0499, RHSA-2013:1302.