USN-2443-1: Linux kernel vulnerabilities

Releases

• Ubuntu 12.04

Packages

• linux - Linux kernel

Details

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register in the x86
architecture. A local attacker could exploit this flaw to gain
administrative privileges. (CVE-2014-9322)

An information leak in the Linux kernel was discovered that could leak the
high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine
(KVM) paravirt guests. A user in the guest OS could exploit this leak to
obtain information that could potentially be used to aid in attacking the
kernel. (CVE-2014-8134)

Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace
subsystem of the Linux kernel does not properly handle private syscall
numbers. A local user could exploit this flaw to cause a denial of service
(OOPS). (CVE-2014-7826)

Rabin Vincent, Robert Swiecki, Russell Kinglaw discovered a flaw in how the
perf subsystem of the Linux kernel handles private systecall numbers. A
local user could exploit this to cause a denial of service (OOPS) or bypass
ASLR protections via a crafted application. (CVE-2014-7825)

A null pointer dereference flaw was discovered in the the Linux kernel's
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)

A stack buffer overflow was discovered in the ioctl command handling for
the Technotrend/Hauppauge USB DEC devices driver. A local user could
exploit this flaw to cause a denial of service (system crash) or possibly
gain privileges. (CVE-2014-8884)

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register on the x86
architecture. A local attacker could exploit this flaw to cause a denial of
service (panic). (CVE-2014-9090)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04

• linux-image-3.2.0-74-highbank - 3.2.0-74.109
• linux-image-3.2.0-74-generic-pae - 3.2.0-74.109
• linux-image-3.2.0-74-powerpc64-smp - 3.2.0-74.109
• linux-image-3.2.0-74-omap - 3.2.0-74.109
• linux-image-3.2.0-74-generic - 3.2.0-74.109
• linux-image-3.2.0-74-powerpc-smp - 3.2.0-74.109
• linux-image-3.2.0-74-virtual - 3.2.0-74.109

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

• CVE-2014-7825
• CVE-2014-7826
• CVE-2014-7841
• CVE-2014-8134
• CVE-2014-8884
• CVE-2014-9090
• CVE-2014-9322

Related notices

• USN-2445-1: linux-image-3.13.0-43-generic-lpae, linux-lts-trusty, linux-image-3.13.0-43-generic
• USN-2447-1: linux-image-3.16.0-28-lowlatency, linux-image-3.16.0-28-powerpc64-smp, linux-lts-utopic, linux-image-3.16.0-28-powerpc-e500mc, linux-image-3.16.0-28-powerpc64-emb, linux-image-3.16.0-28-generic-lpae, linux-image-extra-3.16.0-28-generic, linux-image-3.16.0-28-generic, linux-image-3.16.0-28-powerpc-smp
• USN-2448-1: linux-image-3.16.0-28-lowlatency, linux-image-3.16.0-28-powerpc64-smp, linux-image-3.16.0-28-powerpc-e500mc, linux-image-3.16.0-28-powerpc64-emb, linux-image-3.16.0-28-generic-lpae, linux-image-3.16.0-28-generic, linux-image-3.16.0-28-powerpc-smp, linux
• USN-2446-1: linux-image-3.13.0-43-powerpc64-emb, linux-image-extra-3.13.0-43-generic, linux-image-3.13.0-43-generic, linux-image-3.13.0-43-powerpc64-smp, linux-image-3.13.0-43-powerpc-e500mc, linux-image-3.13.0-43-powerpc-smp, linux-image-3.13.0-43-generic-lpae, linux-image-3.13.0-43-powerpc-e500, linux-image-3.13.0-43-lowlatency, linux
• USN-2444-1: linux-image-3.2.0-1457-omap4, linux-ti-omap4
• USN-2468-1: linux-image-3.16.0-29-generic-lpae, linux-image-3.16.0-29-powerpc64-emb, linux-image-3.16.0-29-powerpc64-smp, linux-image-3.16.0-29-powerpc-e500mc, linux-image-3.16.0-29-powerpc-smp, linux-image-3.16.0-29-generic, linux-image-3.16.0-29-lowlatency, linux
• USN-2442-1: linux-image-2.6.32-374-ec2, linux-ec2
• USN-2467-1: linux-image-3.16.0-29-generic-lpae, linux-image-extra-3.16.0-29-generic, linux-image-3.16.0-29-powerpc64-emb, linux-image-3.16.0-29-powerpc64-smp, linux-lts-utopic, linux-image-3.16.0-29-powerpc-e500mc, linux-image-3.16.0-29-powerpc-smp, linux-image-3.16.0-29-generic, linux-image-3.16.0-29-lowlatency
• USN-2465-1: linux-lts-trusty, linux-image-3.13.0-44-generic-lpae, linux-image-3.13.0-44-generic
• USN-2441-1: linux-image-2.6.32-70-versatile, linux-image-2.6.32-70-generic, linux-image-2.6.32-70-preempt, linux-image-2.6.32-70-server, linux-image-2.6.32-70-386, linux-image-2.6.32-70-virtual, linux-image-2.6.32-70-generic-pae, linux-image-2.6.32-70-powerpc-smp, linux-image-2.6.32-70-lpia, linux-image-2.6.32-70-sparc64, linux-image-2.6.32-70-ia64, linux-image-2.6.32-70-sparc64-smp, linux-image-2.6.32-70-powerpc64-smp, linux, linux-image-2.6.32-70-powerpc
• USN-2466-1: linux-image-3.13.0-44-powerpc-e500mc, linux-image-3.13.0-44-powerpc64-emb, linux-image-3.13.0-44-powerpc-smp, linux-image-3.13.0-44-powerpc64-smp, linux-image-3.13.0-44-generic, linux-image-extra-3.13.0-44-generic, linux-image-3.13.0-44-powerpc-e500, linux-image-3.13.0-44-lowlatency, linux-image-3.13.0-44-generic-lpae, linux
• USN-2464-1: linux-ti-omap4, linux-image-3.2.0-1458-omap4
• USN-2491-1: linux-ec2, linux-image-2.6.32-375-ec2
• USN-2462-1: linux-image-2.6.32-71-server, linux-image-2.6.32-71-sparc64-smp, linux-image-2.6.32-71-virtual, linux-image-2.6.32-71-generic-pae, linux-image-2.6.32-71-generic, linux-image-2.6.32-71-preempt, linux-image-2.6.32-71-sparc64, linux-image-2.6.32-71-386, linux-image-2.6.32-71-lpia, linux-image-2.6.32-71-powerpc64-smp, linux-image-2.6.32-71-powerpc-smp, linux-image-2.6.32-71-ia64, linux-image-2.6.32-71-versatile, linux, linux-image-2.6.32-71-powerpc