CVE-2012-4538: Input Validation
First published: Sat Nov 24 2012(Updated: )
The HVMOP_pagetable_dying hypercall in Xen 4.0, 4.1, and 4.2 does not properly check the pagetable state when running on shadow pagetables, which allows a local HVM guest OS to cause a denial of service (hypervisor crash) via unspecified vectors.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Xen xen-unstable | =4.0.0 | |
| Xen xen-unstable | =4.1.0 | |
| Xen xen-unstable | =4.2.0 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
- http://lists.xen.org/archives/html/xen-announce/2012-11/msg00004.html
- http://osvdb.org/87306
- http://secunia.com/advisories/51200
- http://secunia.com/advisories/51324
- http://secunia.com/advisories/51352
- http://secunia.com/advisories/51413
- http://secunia.com/advisories/51468
- http://secunia.com/advisories/55082
- http://security.gentoo.org/glsa/glsa-201309-24.xml
- http://www.debian.org/security/2012/dsa-2582
- http://www.openwall.com/lists/oss-security/2012/11/13/3
- http://www.securityfocus.com/bid/56498
- http://www.securitytracker.com/id?1027762
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80025
- https://security.gentoo.org/glsa/201604-03
Frequently Asked Questions
What is the severity of CVE-2012-4538?
CVE-2012-4538 has been classified as a denial of service vulnerability that can crash the hypervisor.
How do I fix CVE-2012-4538?
To remediate CVE-2012-4538, upgrade to a patched version of Xen beyond 4.2.
Who is affected by CVE-2012-4538?
CVE-2012-4538 affects local HVM guest operating systems running on Xen versions 4.0, 4.1, and 4.2.
What impact does CVE-2012-4538 have on my system?
CVE-2012-4538 can lead to hypervisor crashes resulting in service disruptions for virtual machines.
Is CVE-2012-4538 exploitable remotely?
CVE-2012-4538 is not a remote vulnerability; it requires local access to the HVM guest OS to be exploited.
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- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/references
- agent/author
- agent/last-modified-date
- agent/weakness
- agent/description
- agent/event
- agent/first-publish-date
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/xen
- canonical/xen xen-unstable
- version/xen xen-unstable/4.0.0
- version/xen xen-unstable/4.1.0
- version/xen xen-unstable/4.2.0