CVE-2011-4073 Use after free in n/a

Medium 4.0 Published 17 Nov 2011 Updated 6 Aug 2024

Remote authenticated users can crash the Openswan IKE daemon via a use-after-free vulnerability in cryptographic helper handlers.

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-2011-4073?

CVE-2011-4073 is a medium-severity use after free vulnerability in n/a, published on 17 Nov 2011. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Use-after-free vulnerability in the cryptographic helper handler functionality in Openswan 2.3.0 through 2.6.36 allows remote authenticated users to cause a denial of service (pluto IKE daemon crash) via vectors related to the (1) quick_outI1_continue and (2) quick_outI1 functions.

Weakness: CWE-399

Which versions are affected by CVE-2011-4073?

It affects 1 product.

Linux distribution packages (9)

`openswan` Red Hat:enterprise_linux:5::client	All versions	`0:2.6.21-5.el5_7.6`
`openswan-debuginfo` Red Hat:enterprise_linux:5::client	All versions	`0:2.6.21-5.el5_7.6`
`openswan-doc` Red Hat:enterprise_linux:5::client	All versions	`0:2.6.21-5.el5_7.6`
`openswan` Red Hat:enterprise_linux:5::server	All versions	`0:2.6.21-5.el5_7.6`
`openswan-debuginfo` Red Hat:enterprise_linux:5::server	All versions	`0:2.6.21-5.el5_7.6`
`openswan-doc` Red Hat:enterprise_linux:5::server	All versions	`0:2.6.21-5.el5_7.6`
`openswan` Red Hat:enterprise_linux:6::server	All versions	`0:2.6.32-4.el6_1.4`
`openswan-debuginfo` Red Hat:enterprise_linux:6::server	All versions	`0:2.6.32-4.el6_1.4`
`openswan-doc` Red Hat:enterprise_linux:6::server	All versions	`0:2.6.32-4.el6_1.4`

Products include Xelerance Openswan.

How do I fix CVE-2011-4073?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2011-4073 being exploited?

There is no known exploitation of CVE-2011-4073 in the wild and no public exploit code.

Sources

Also known as DSA-2374-1, GHSA-p53h-4vvv-85x4, RHSA-2011:1422.