medium
4.7
Advisory Published
Updated

CVE-2012-5515

First published: Thu Dec 13 2012(Updated: )

The (1) XENMEM_decrease_reservation, (2) XENMEM_populate_physmap, and (3) XENMEM_exchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service (long loop and hang) via a crafted extent_order value.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Xen xen-unstable<=4.2.0
Xen xen-unstable=3.0.2
Xen xen-unstable=3.0.3
Xen xen-unstable=3.0.4
Xen xen-unstable=3.1.3
Xen xen-unstable=3.1.4
Xen xen-unstable=3.2.0
Xen xen-unstable=3.2.1
Xen xen-unstable=3.2.2
Xen xen-unstable=3.2.3
Xen xen-unstable=3.3.0
Xen xen-unstable=3.3.1
Xen xen-unstable=3.3.2
Xen xen-unstable=3.4.0
Xen xen-unstable=3.4.1
Xen xen-unstable=3.4.2
Xen xen-unstable=3.4.3
Xen xen-unstable=3.4.4
Xen xen-unstable=4.0.0
Xen xen-unstable=4.0.1
Xen xen-unstable=4.0.2
Xen xen-unstable=4.0.3
Xen xen-unstable=4.0.4
Xen xen-unstable=4.1.0
Xen xen-unstable=4.1.1
Xen xen-unstable=4.1.2
Xen xen-unstable=4.1.3

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2012-5515?

    CVE-2012-5515 is classified as a denial of service vulnerability due to its potential to cause system hangs.

  • How do I fix CVE-2012-5515?

    The recommended solution to mitigate CVE-2012-5515 is to upgrade to a version of Xen later than 4.2.

  • Which versions of Xen are affected by CVE-2012-5515?

    CVE-2012-5515 affects Xen versions 4.2 and earlier, including specific releases from 3.0.2 to 4.2.0.

  • Can a local guest administrator exploit CVE-2012-5515?

    Yes, local guest administrators can exploit CVE-2012-5515 by crafting specific values that lead to prolonged resource loops.

  • Is there a workaround for CVE-2012-5515?

    While upgrading is the best approach, administrators can limit access for guest administrators to mitigate potential exploitation.

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