Debian: DSA-2010-1: New kvm packages fix several vulnerabilities

    Date10 Mar 2010
    CategoryDebian
    48
    Posted ByLinuxSecurity Advisories
    Several local vulnerabilities have been discovered in kvm, a full virtualization system. The Common Vulnerabilities and Exposures project identifies the following problems:
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    Debian Security Advisory DSA-2010                  This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                         Dann Frazier
    March 10, 2010                   http://www.debian.org/security/faq
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    Package        : kvm
    Vulnerability  : privilege escalation/denial of service
    Problem type   : local
    Debian-specific: no
    CVE Id(s)      : CVE-2010-0298 CVE-2010-0306 CVE-2010-0309 CVE-2010-0419
    
    Several local vulnerabilities have been discovered in kvm, a full
    virtualization system. The Common Vulnerabilities and Exposures project
    identifies the following problems:
    
    CVE-2010-0298 & CVE-2010-0306
    
        Gleb Natapov discovered issues in the KVM subsystem where missing
        permission checks (CPL/IOPL) permit a user in a guest system to
        denial of service a guest (system crash) or gain escalated
        privileges with the guest.
    
    CVE-2010-0309
    
        Marcelo Tosatti fixed an issue in the PIT emulation code in the
        KVM subsystem that allows privileged users in a guest domain to
        cause a denial of service (crash) of the host system.
    
    CVE-2010-0419
    
        Paolo Bonzini found a bug in KVM that can be used to bypass proper
        permission checking while loading segment selectors. This
        potentially allows privileged guest users to execute privileged
        instructions on the host system.
    
    For the stable distribution (lenny), this problem has been fixed in
    version 72+dfsg-5~lenny5.
    
    For the testing distribution (squeeze), and the unstable distribution (sid),
    these problems will be addressed within the linux-2.6 package.
    
    We recommend that you upgrade your kvm package.
    
    Upgrade instructions
    - --------------------
    
    wget url
            will fetch the file for you
    dpkg -i file.deb
            will install the referenced file.
    
    If you are using the apt-get package manager, use the line for
    sources.list as given below:
    
    apt-get update
            will update the internal database
    apt-get upgrade
            will install corrected packages
    
    You may use an automated update by adding the resources from the
    footer to the proper configuration.
    
    Debian GNU/Linux 5.0 alias lenny
    - --------------------------------
    
    Debian (stable)
    - ---------------
    
    Stable updates are available for amd64 and i386.
    
    Source archives:
    
      http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny5.dsc
        Size/MD5 checksum:     1341 14718fcd8584519702b567233d31abd6
      http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg.orig.tar.gz
        Size/MD5 checksum:  3250251 899a66ae2ea94e994e06f637e1afef4a
      http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny5.diff.gz
        Size/MD5 checksum:    51204 40d0b0ba8df5fbd8cfc0c837b0da4db2
    
    Architecture independent packages:
    
      http://security.debian.org/pool/updates/main/k/kvm/kvm-source_72+dfsg-5~lenny5_all.deb
        Size/MD5 checksum:   159990 7a50d4ad7242107fa3443fcf6a30197d
    
    amd64 architecture (AMD x86_64 (AMD64))
    
      http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny5_amd64.deb
        Size/MD5 checksum:  1110560 df3bcd5f384fc054863dac9947f60ddb
    
    i386 architecture (Intel ia32)
    
      http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny5_i386.deb
        Size/MD5 checksum:  1034558 4f74cdb89f87634ef7c44c2a2d488a1a
    
    
      These files will probably be moved into the stable distribution on
      its next update.
    
    - ---------------------------------------------------------------------------------
    For apt-get: deb http://security.debian.org/ stable/updates main
    For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    Package info: `apt-cache show ' and http://packages.debian.org/
    
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