CVE-2012-2625 Denial of service in n/a

Low 2.7 Published 31 Oct 2012 Updated 6 Aug 2024

Local para-virtualized guest users can cause a denial of service in the Xen PyGrub boot loader by providing a large compressed kernel image.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2012-2625?

CVE-2012-2625 is a low-severity denial of service vulnerability in Xen Xen, published on 31 Oct 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The PyGrub boot loader in Xen unstable before changeset 25589:60f09d1ab1fe, 4.2.x, and 4.1.x allows local para-virtualized guest users to cause a denial of service (memory consumption) via a large (1) bzip2 or (2) lzma compressed kernel image.

Weakness: CWE-20

Which versions are affected by CVE-2012-2625?

It affects 2 products.

Linux distribution packages (12)

`xen` Red Hat:enterprise_linux:5::client	All versions	`0:3.0.3-135.el5_8.4`
`xen-debuginfo` Red Hat:enterprise_linux:5::client	All versions	`0:3.0.3-135.el5_8.4`
`xen-libs` Red Hat:enterprise_linux:5::client	All versions	`0:3.0.3-135.el5_8.4`
`xen` Red Hat:enterprise_linux:5::server	All versions	`0:3.0.3-135.el5_8.4`
`xen-debuginfo` Red Hat:enterprise_linux:5::server	All versions	`0:3.0.3-135.el5_8.4`
`xen-libs` Red Hat:enterprise_linux:5::server	All versions	`0:3.0.3-135.el5_8.4`
`xen` Red Hat:rhel_virtualization:5::client	All versions	`0:3.0.3-135.el5_8.4`
`xen-debuginfo` Red Hat:rhel_virtualization:5::client	All versions	`0:3.0.3-135.el5_8.4`
`xen-devel` Red Hat:rhel_virtualization:5::client	All versions	`0:3.0.3-135.el5_8.4`
`xen` Red Hat:rhel_virtualization:5::server	All versions	`0:3.0.3-135.el5_8.4`
`xen-debuginfo` Red Hat:rhel_virtualization:5::server	All versions	`0:3.0.3-135.el5_8.4`
`xen-devel` Red Hat:rhel_virtualization:5::server	All versions	`0:3.0.3-135.el5_8.4`

Products include Xen Xen, Xen Xen-Unstable.

How do I fix CVE-2012-2625?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2012-2625 being exploited?

There is no known exploitation of CVE-2012-2625 in the wild and no public exploit code.

All Xen Xen vulnerabilities

Sources

Also known as DEBIAN-CVE-2012-2625, GHSA-87h8-hfg7-gxc3, RHSA-2012:1130.