Debian: DSA-2544-1: xen security update

    Date08 Sep 2012
    CategoryDebian
    42
    Posted ByLinuxSecurity Advisories
    Multiple denial of service vulnerabilities have been discovered in xen, an hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems:
    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-2544-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                          Raphael Geissert
    September 08, 2012                     http://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : xen
    Vulnerability  : denial of service
    Problem type   : local
    Debian-specific: no
    CVE ID         : CVE-2012-3494 CVE-2012-3496
    
    Multiple denial of service vulnerabilities have been discovered in xen,
    an hypervisor. The Common Vulnerabilities and Exposures project identifies
    the following problems:
    
    CVE-2012-3494:
    
        It was discovered that set_debugreg allows writes to reserved bits
        of the DR7 debug control register on amd64 (x86-64) paravirtualised
        guests, allowing a guest to crash the host.
    
    CVE-2012-3496:
    
        Matthew Daley discovered that XENMEM_populate_physmap, when called
        with the MEMF_populate_on_demand flag set, a BUG (detection routine)
        can be triggered if a translating paging mode is not being used,
        allowing a guest to crash the host.
    
    For the stable distribution (squeeze), these problems have been fixed in
    version 4.0.1-5.4.
    
    For the testing distribution (wheezy), these problems will be fixed
    soon.
    
    For the unstable distribution (sid), these problems have been fixed in
    version 4.1.3-2.
    
    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.
    
    You are not authorised to post comments.

    Comments powered by CComment

    LinuxSecurity Poll

    What do you think of the articles on LinuxSecurity?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/24-what-do-you-think-of-the-quality-of-the-articles-on-linuxsecurity?task=poll.vote&format=json
    24
    radio
    [{"id":"87","title":"Excellent, don't change a thing!","votes":"14","type":"x","order":"1","pct":53.85,"resources":[]},{"id":"88","title":"Should be more technical","votes":"4","type":"x","order":"2","pct":15.38,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"8","type":"x","order":"3","pct":30.77,"resources":[]}]["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"]["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"]350
    bottom200

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.