Debian: DSA-2531-1: xen security update

    Date18 Aug 2012
    CategoryDebian
    51
    Posted ByLinuxSecurity Advisories
    Several denial-of-service vulnerabilities have been discovered in Xen, the popular virtualization software. The Common Vulnerabilities and Exposures project identifies the following issues:
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-2531-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                             Luciano Bello
    August 18, 2012                        http://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : xen
    Vulnerability  : Denial of Service
    Problem type   : remote
    Debian-specific: no
    CVE ID         : CVE-2012-3432 CVE-2012-3433
    Debian Bug     : 683279
    
    Several denial-of-service vulnerabilities have been discovered in Xen,
    the popular virtualization software. The Common Vulnerabilities and 
    Exposures project identifies the following issues:
    
    CVE-2012-3432
    
     Guest mode unprivileged code, which has been granted the privilege to 
     access MMIO regions, may leverage that access to crash the whole guest.
     Since this be used to crash a client from within, this vulnerability is
     consider with low impact.
    
    CVE-2012-3433
    
     A guest kernel can cause the host to become unresponsive for a period
     of time, potentially leading to a DoS. Since an attacker with full
     control in the guest can impact on the host, this vulnerability is
     consider with high impact.
    
    For the stable distribution (squeeze), this problem has been fixed in
    version 4.0.1-5.3.
    
    For the unstable distribution (sid), this problem has been fixed in
    version 4.1.3-1.
    
    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.
    
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