Debian: DSA-2501-1: xen security update

    Date24 Jun 2012
    CategoryDebian
    30
    Posted ByLinuxSecurity Advisories
    Several vulnerabilities were discovered in Xen, a hypervisor. CVE-2012-0217 Xen does not properly handle uncanonical return addresses on
    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-2501-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                            Florian Weimer
    June 24, 2012                          http://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : xen
    Vulnerability  : several
    Problem type   : local
    Debian-specific: no
    CVE ID         : CVE-2012-0217 CVE-2012-0218 CVE-2012-2934
    
    Several vulnerabilities were discovered in Xen, a hypervisor.
    
    CVE-2012-0217
    	Xen does not properly handle uncanonical return addresses on
    	Intel amd64 CPUs, allowing amd64 PV guests to elevate to
    	hypervisor privileges.  AMD processors, HVM and i386 guests
    	are not affected.
    
    CVE-2012-0218
    	Xen does not properly handle SYSCALL and SYSENTER instructions
    	in PV guests, allowing unprivileged users inside a guest
    	system to crash the guest system.
    
    CVE-2012-2934
    	Xen does not detect old AMD CPUs affected by AMD Erratum #121.
    
    For CVE-2012-2934, Xen refuses to start domUs on affected systems
    unless the "allow_unsafe" option is passed.
    
    For the stable distribution (squeeze), these problems have been fixed
    in version 4.0.1-5.2.
    
    For the testing distribution (wheezy) and the unstable distribution
    (sid), these problems have been fixed in version
    4.1.3~rc1+hg-20120614.a9c0a89c08f2-1.
    
    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: 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":"23","type":"x","order":"1","pct":56.1,"resources":[]},{"id":"88","title":"Should be more technical","votes":"5","type":"x","order":"2","pct":12.2,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"13","type":"x","order":"3","pct":31.71,"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.