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  • [SECURITY] [DSA-1962-1] New kvm packages fix several vulnerabilities

    From Giuseppe Iuculano@1:229/2 to All on Wed Dec 23 13:00:01 2009
    From: [email protected]

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    - ------------------------------------------------------------------------ Debian Security Advisory DSA-1962 [email protected] http://www.debian.org/security/ Giuseppe Iuculano
    December 23, 2009 http://www.debian.org/security/faq
    - ------------------------------------------------------------------------

    Package : kvm
    Vulnerability : several vulnerabilities
    Problem type : local
    Debian-specific: no
    Debian bugs : 557739 562075 562076
    CVE Ids : CVE-2009-3638 CVE-2009-3722 CVE-2009-4031


    Several vulnerabilities have been discovered in kvm, a full virtualization system.
    The Common Vulnerabilities and Exposures project identifies the
    following problems:

    CVE-2009-3638

    It was discovered an Integer overflow in the kvm_dev_ioctl_get_supported_cpuid function. This allows local users to have an unspecified impact via a KVM_GET_SUPPORTED_CPUID request to the kvm_arch_dev_ioctl function.


    CVE-2009-3722

    It was discovered that the handle_dr function in the KVM subsystem does not properly verify the Current Privilege Level (CPL) before accessing a debug register, which allows guest OS users to cause a denial of service (trap) on the
    host OS via a crafted application.


    CVE-2009-4031

    It was discovered that the do_insn_fetch function in the x86 emulator in the KVM
    subsystem tries to interpret instructions that contain too many bytes to be valid, which allows guest OS users to cause a denial of service (increased scheduling latency) on the host OS via unspecified manipulations related to SMP support.


    For the stable distribution (lenny), these problems have been fixed in version 72+dfsg-5~lenny4.

    For the testing distribution (squeeze), and the unstable distribution (sid), these problems will be fixed soon.


    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 alpha, amd64, arm, armel, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc.

    Source archives:

    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~lenny4.diff.gz
    Size/MD5 checksum: 42354 12a3490ebcba2c1e9aa2a86140eaa2e3
    http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny4.dsc
    Size/MD5 checksum: 1349 95ea1b5511954549694e198b838e308c

    Architecture independent packages:


    http://security.debian.org/pool/updates/main/k/kvm/kvm-source_72+dfsg-5~lenny4_all.deb
    Size/MD5 checksum: 158524 70f46f694afd3169ce16a4c84ee32eb6

    amd64 architecture (AMD x86_64 (AMD64))

    http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny4_amd64.deb
    Size/MD5 checksum: 1105892 22f218058f3cc3f8d40ca9069ff151f9

    i386 architecture (Intel ia32)

    http://security.debian.org/pool/updates/main/k/kvm/kvm_72+dfsg-5~lenny4_i386.deb
    Size/MD5 checksum: 1030580 ffdfcfce508514828bf455183e45f581


    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: [email protected]
    Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg> -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1.4.10 (GNU/Linux)

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