Debian: DSA-2443-1: linux-2.6 security update

    Date26 Mar 2012
    CategoryDebian
    302
    Posted ByLinuxSecurity Advisories
    Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems:
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    Debian Security Advisory DSA-2443-1                This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                           Dann Frazier
    March 26, 2012                      http://www.debian.org/security/faq
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    Package        : linux-2.6
    Vulnerability  : privilege escalation/denial of service
    Problem type   : local
    Debian-specific: no
    CVE Id(s)      : CVE-2009-4307 CVE-2011-1833 CVE-2011-4347 CVE-2012-0045
                     CVE-2012-1090 CVE-2012-1097
    
    Several vulnerabilities have been discovered in the Linux kernel that may lead
    to a denial of service or privilege escalation. The Common Vulnerabilities and
    Exposures project identifies the following problems:
    
    CVE-2009-4307
    
        Nageswara R Sastry reported an issue in the ext4 filesystem. Local users
        with the privileges to mount a filesystem can cause a denial of service
        (BUG) by providing a s_log_groups_per_flex value greater than 31.
    
    CVE-2011-1833
    
        Vasiliy Kulikov of Openwall and Dan Rosenberg discovered an information
        leak in the eCryptfs filesystem. Local users were able to mount arbitrary
        directories.
    
    CVE-2011-4347
    
        Sasha Levin reported an issue in the device assignment functionality in
        KVM. Local users with permission to access /dev/kvm could assign unused pci
        devices to a guest and cause a denial of service (crash).
    
    CVE-2012-0045
    
        Stephan Barwolf reported an issue in KVM. Local users in a 32-bit guest
        running on a 64-bit system can crash the guest with a syscall instruction.
    
    CVE-2012-1090
    
        CAI Qian reported an issue in the CIFS filesystem. A reference count leak
        can occur during the lookup of special files, resulting in a denial of
        service (oops) on umount.
    
    CVE-2012-1097
    
        H. Peter Anvin reported an issue in the regset infrastructure. Local users
        can cause a denial of service (NULL pointer dereference) by triggering the
        write methods of readonly regsets.
    
    For the stable distribution (squeeze), this problem has been fixed in version
    2.6.32-41squeeze2.
    
    The following matrix lists additional source packages that were rebuilt for
    compatibility with or to take advantage of this update:
    
                                                 Debian 6.0 (squeeze)
         user-mode-linux                         2.6.32-1um-4+41squeeze2
    
    We recommend that you upgrade your linux-2.6 and user-mode-linux packages.
    
    Thanks to Micah Anderson for proof reading this text.
    
    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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