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  • [SECURITY] [DSA 2531-1] xen security update

    From Luciano Bello@1:229/2 to All on Sat Aug 18 17:50:02 2012
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-2531-1 [email protected] http://www.debian.org/security/ Luciano Bello August 18, 2012 http://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : xen
    Vulnerability : Denial of Service
    Problem type : remote
    Debian-specific: no
    CVE ID : CVE-2012-3432 CVE-2012-3433
    Debian Bug : 683279

    Several denial-of-service vulnerabilities have been discovered in Xen,
    the popular virtualization software. The Common Vulnerabilities and
    Exposures project identifies the following issues:

    CVE-2012-3432

    Guest mode unprivileged code, which has been granted the privilege to
    access MMIO regions, may leverage that access to crash the whole guest.
    Since this be used to crash a client from within, this vulnerability is
    consider with low impact.

    CVE-2012-3433

    A guest kernel can cause the host to become unresponsive for a period
    of time, potentially leading to a DoS. Since an attacker with full
    control in the guest can impact on the host, this vulnerability is
    consider with high impact.

    For the stable distribution (squeeze), this problem has been fixed in
    version 4.0.1-5.3.

    For the unstable distribution (sid), this problem has been fixed in
    version 4.1.3-1.

    We recommend that you upgrade your xen packages.

    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: http://www.debian.org/security/

    Mailing list: [email protected]
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