Debian: DSA-2666-1: xen security update

    Date12 May 2013
    CategoryDebian
    27
    Posted ByLinuxSecurity Advisories
    Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems:
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    Debian Security Advisory DSA-2666-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                      Salvatore Bonaccorso
    May 12, 2013                           http://www.debian.org/security/faq
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    Package        : xen
    Vulnerability  : several
    Problem type   : remote
    Debian-specific: no
    CVE ID         : CVE-2013-1918 CVE-2013-1952 CVE-2013-1964
    
    Multiple vulnerabilities have been discovered in the Xen hypervisor. The
    Common Vulnerabilities and Exposures project identifies the following
    problems:
    
    CVE-2013-1918 (XSA 45) Several long latency operations are not preemptible
    
        Some page table manipulation operations for PV guests were not made
        preemptible, allowing a malicious or buggy PV guest kernel to mount a
        denial of service attack affecting the whole system.
    
    CVE-2013-1952 (XSA 49) VT-d interrupt remapping source validation flaw for bridges
    
        Due to missing source validation on interrupt remapping table
        entries for MSI interrupts set up by bridge devices, a malicious
        domain with access to such a device, can mount a denial of service
        attack affecting the whole system.
    
    CVE-2013-1964 (XSA 50) grant table hypercall acquire/release imbalance
    
        When releasing a particular, non-transitive grant after doing a grant
        copy operation Xen incorrectly releases an unrelated grant
        reference, leading possibly to a crash of the host system.
        Furthermore information leakage or privilege escalation cannot be
        ruled out.
    
    For the oldstable distribution (squeeze), these problems have been fixed in
    version 4.0.1-5.11.
    
    For the stable distribution (wheezy), these problems have been fixed in
    version 4.1.4-3+deb7u1.
    
    For the testing distribution (jessie), these problems have been fixed in
    version 4.1.4-4.
    
    For the unstable distribution (sid), these problems have been fixed in
    version 4.1.4-4.
    
    Note that for the stable (wheezy), testing and unstable distribution,
    CVE-2013-1964 (XSA 50) was already fixed in version 4.1.4-3.
    
    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: This email address is being protected from spambots. You need JavaScript enabled to view it.
    
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