Debian: DSA-2666-1: xen security update

    Date 12 May 2013
    104
    Posted By LinuxSecurity 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.
    https://www.debian.org/security/                      Salvatore Bonaccorso
    May 12, 2013                           https://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: https://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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