Debian: DSA-2389-1: linux-2.6 security update

    Date15 Jan 2012
    CategoryDebian
    46
    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-2389-1                This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                           Dann Frazier
    January 15, 2012                    http://www.debian.org/security/faq
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    Package        : linux-2.6
    Vulnerability  : privilege escalation/denial of service/information leak
    Problem type   : local/remote
    Debian-specific: no
    CVE Id(s)      : CVE-2011-2183 CVE-2011-2213 CVE-2011-2898 CVE-2011-3353
                     CVE-2011-4077 CVE-2011-4110 CVE-2011-4127 CVE-2011-4611
                     CVE-2011-4622 CVE-2011-4914
    
    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-2011-2183
    
        Andrea Righi reported an issue in KSM, a memory-saving de-duplication
        feature. By exploiting a race with exiting tasks, local users can cause
        a kernel oops, resulting in a denial of service.
                     
    CVE-2011-2213
    
        Dan Rosenberg discovered an issue in the INET socket monitoring interface.
        Local users could cause a denial of service by injecting code and causing
        the kernel to execute an infinite loop.
    
    CVE-2011-2898
    
        Eric Dumazet reported an information leak in the raw packet socket
        implementation.
    
    CVE-2011-3353
    
        Han-Wen Nienhuys reported a local denial of service issue issue in the FUSE
        (Filesystem in Userspace) support in the linux kernel. Local users could
        cause a buffer overflow, leading to a kernel oops and resulting in a denial
        of service.
    
    CVE-2011-4077
    
        Carlos Maiolino reported an issue in the XFS filesystem. A local user
        with the ability to mount a filesystem could corrupt memory resulting
        in a denial of service or possibly gain elevated privileges.
    
    CVE-2011-4110
    
        David Howells reported an issue in the kernel's access key retention
        system which allow local users to cause a kernel oops leading to a denial
        of service.
    
    CVE-2011-4127
    
        Paolo Bonzini of Red Hat reported an issue in the ioctl passthrough
        support for SCSI devices. Users with permission to access restricted
        portions of a device (e.g. a partition or a logical volume) can obtain
        access to the entire device by way of the SG_IO ioctl. This could be
        exploited by a local user or privileged VM guest to achieve a privilege
        escalation.
    
    CVE-2011-4611
    
        Maynard Johnson reported an issue with the perf support on POWER7 systems
        that allows local users to cause a denial of service.
    
    CVE-2011-4622
    
        Jan Kiszka reported an issue in the KVM PIT timer support. Local users
        with the permission to use KVM can cause a denial of service by starting
        a PIT timer without first setting up the irqchip.
    
    CVE-2011-4914
    
        Ben Hutchings reported various bounds checking issues within the ROSE
        protocol support in the kernel. Remote users could possibly use this
        to gain access to sensitive memory or cause a denial of service.
    
    For the stable distribution (squeeze), this problem has been fixed in version
    2.6.32-39squeeze1. Updates for issues impacting the oldstable distribution
    (lenny) will be available soon.
    
    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+39squeeze1
    
    We recommend that you upgrade your linux-2.6 and user-mode-linux 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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