Linux Security
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    Debian: DSA-3390-1: xen security update

    Date 02 Nov 2015
    187
    Posted By LinuxSecurity Advisories
    It was discovered that the code to validate level 2 page table entries is bypassed when certain conditions are satisfied. A malicious PV guest administrator can take advantage of this flaw to gain privileges via a crafted superpage mapping.
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-3390-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    November 02, 2015                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : xen
    CVE ID         : CVE-2015-7835
    
    It was discovered that the code to validate level 2 page table entries
    is bypassed when certain conditions are satisfied. A malicious PV guest
    administrator can take advantage of this flaw to gain privileges via a
    crafted superpage mapping.
    
    For the oldstable distribution (wheezy), this problem has been fixed
    in version 4.1.4-3+deb7u9.
    
    For the stable distribution (jessie), this problem has been fixed in
    version 4.4.1-9+deb8u2.
    
    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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