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[SECURITY] [DLA 360-1] linux-2.6 security update



Package        : linux-2.6
Version        : 2.6.32-48squeeze17
CVE ID         : CVE-2013-7446 CVE-2015-7799 CVE-2015-7833 CVE-2015-7990 
                 CVE-2015-8324

This update fixes the CVEs described below.

CVE-2013-7446

    Dmitry Vyukov discovered that a particular sequence of valid
    operations on local (AF_UNIX) sockets can result in a
    use-after-free.  This may be used to cause a denial of service
    (crash) or possibly for privilege escalation.

CVE-2015-7799

    郭永刚 discovered that a user granted access to /dev/ppp can cause
    a denial of service (crash) by passing invalid parameters to the
    PPPIOCSMAXCID ioctl.  This also applies to ISDN PPP device nodes.

CVE-2015-7833

    Sergej Schumilo, Hendrik Schwartke and Ralf Spenneberg discovered a
    flaw in the processing of certain USB device descriptors in the
    usbvision driver. An attacker with physical access to the system can
    use this flaw to crash the system.

CVE-2015-7990

    It was discovered that the fix for CVE-2015-6937 was incomplete. A
    race condition when sending a message on unbound socket can still
    cause a NULL pointer dereference. A remote attacker might be able to
    cause a denial of service (crash) by sending a crafted packet.

CVE-2015-8324

    "Valintinr" reported that an attempt to mount a corrupted ext4
    filesystem may result in a kernel panic.  A user permitted to
    mount filesystems could use this flaw to crash the system.

For the oldoldstable distribution (squeeze), these problems have been
fixed in version 2.6.32-48squeeze17.  We recommend that you upgrade your
linux-2.6 packages.

For the oldstable (wheezy) and stable (jessie) distributions,
CVE-2015-7833, CVE-2015-7990 and CVE-2015-8324 have been fixed and the
other issues will be fixed soon.

-- 
Ben Hutchings - Debian developer, member of Linux kernel and LTS teams


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