CVE-2012-4545 Auth bypass in n/a

Medium 5.1 Published 3 Jan 2013 Updated 6 Aug 2024

Remote servers can authenticate as the client via delegated GSSAPI credentials when ELinks uses HTTP Negotiate authentication.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2012-4545?

CVE-2012-4545 is a medium-severity authentication bypass vulnerability in n/a, published on 3 Jan 2013. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The http_negotiate_create_context function in protocol/http/http_negotiate.c in ELinks 0.12 before 0.12pre6, when using HTTP Negotiate or GSS-Negotiate authentication, delegates user credentials through GSSAPI, which allows remote servers to authenticate as the client via the delegated credentials.

Weakness: CWE-287

Which versions are affected by CVE-2012-4545?

It affects 1 product.

Linux distribution packages (10)

`elinks` Red Hat:enterprise_linux:5::server	All versions	`0:0.11.1-8.el5_9`
`elinks-debuginfo` Red Hat:enterprise_linux:5::server	All versions	`0:0.11.1-8.el5_9`
`elinks` Red Hat:enterprise_linux:6::client	All versions	`0:0.12-0.21.pre5.el6_3`
`elinks-debuginfo` Red Hat:enterprise_linux:6::client	All versions	`0:0.12-0.21.pre5.el6_3`
`elinks` Red Hat:enterprise_linux:6::computenode	All versions	`0:0.12-0.21.pre5.el6_3`
`elinks-debuginfo` Red Hat:enterprise_linux:6::computenode	All versions	`0:0.12-0.21.pre5.el6_3`
`elinks` Red Hat:enterprise_linux:6::server	All versions	`0:0.12-0.21.pre5.el6_3`
`elinks-debuginfo` Red Hat:enterprise_linux:6::server	All versions	`0:0.12-0.21.pre5.el6_3`
`elinks` Red Hat:enterprise_linux:6::workstation	All versions	`0:0.12-0.21.pre5.el6_3`
`elinks-debuginfo` Red Hat:enterprise_linux:6::workstation	All versions	`0:0.12-0.21.pre5.el6_3`

Products include Elinks Elinks.

How do I fix CVE-2012-4545?

Upgrade to a fixed version.

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

Is CVE-2012-4545 being exploited?

There is no known exploitation of CVE-2012-4545 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2012-4545, DSA-2592-1, GHSA-rqcr-v8rp-mcvc, RHSA-2013:0250.