USN-2468-1: Linux kernel vulnerabilities

Releases

• Ubuntu 14.10

Packages

• linux - Linux kernel

Details

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 race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)

Miloš Prchlík reported a flaw in how the ARM64 platform handles a single
byte overflow in __clear_user. A local user could exploit this flaw to
cause a denial of service (system crash) by reading one byte beyond a
/dev/zero page boundary. (CVE-2014-7843)

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)

Update instructions

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

Ubuntu 14.10

• linux-image-3.16.0-29-powerpc-smp - 3.16.0-29.39
• linux-image-3.16.0-29-lowlatency - 3.16.0-29.39
• linux-image-3.16.0-29-powerpc-e500mc - 3.16.0-29.39
• linux-image-3.16.0-29-generic-lpae - 3.16.0-29.39
• linux-image-3.16.0-29-powerpc64-emb - 3.16.0-29.39
• linux-image-3.16.0-29-powerpc64-smp - 3.16.0-29.39
• linux-image-3.16.0-29-generic - 3.16.0-29.39

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-2014-7841
• CVE-2014-7842
• CVE-2014-7843
• CVE-2014-8884

Related notices

• USN-2442-1: linux-image-2.6.32-374-ec2, linux-ec2
• USN-2467-1: linux-image-3.16.0-29-generic, linux-lts-utopic, linux-image-3.16.0-29-lowlatency, linux-image-3.16.0-29-powerpc-smp, linux-image-3.16.0-29-generic-lpae, linux-image-extra-3.16.0-29-generic, linux-image-3.16.0-29-powerpc-e500mc, linux-image-3.16.0-29-powerpc64-emb, linux-image-3.16.0-29-powerpc64-smp
• USN-2465-1: linux-image-3.13.0-44-generic, linux-lts-trusty, linux-image-3.13.0-44-generic-lpae
• USN-2443-1: linux-image-3.2.0-74-virtual, linux-image-3.2.0-74-omap, linux-image-3.2.0-74-generic-pae, linux-image-3.2.0-74-powerpc-smp, linux-image-3.2.0-74-generic, linux-image-3.2.0-74-highbank, linux-image-3.2.0-74-powerpc64-smp, linux
• USN-2441-1: linux-image-2.6.32-70-powerpc-smp, linux-image-2.6.32-70-virtual, linux-image-2.6.32-70-sparc64-smp, linux-image-2.6.32-70-386, linux-image-2.6.32-70-lpia, linux-image-2.6.32-70-powerpc, linux-image-2.6.32-70-powerpc64-smp, linux-image-2.6.32-70-sparc64, linux-image-2.6.32-70-generic-pae, linux-image-2.6.32-70-server, linux-image-2.6.32-70-versatile, linux-image-2.6.32-70-preempt, linux, linux-image-2.6.32-70-ia64, linux-image-2.6.32-70-generic
• USN-2466-1: linux-image-extra-3.13.0-44-generic, linux, linux-image-3.13.0-44-powerpc-smp, linux-image-3.13.0-44-powerpc-e500mc, linux-image-3.13.0-44-generic, linux-image-3.13.0-44-powerpc64-smp, linux-image-3.13.0-44-generic-lpae, linux-image-3.13.0-44-powerpc64-emb, linux-image-3.13.0-44-powerpc-e500, linux-image-3.13.0-44-lowlatency
• USN-2444-1: linux-ti-omap4, linux-image-3.2.0-1457-omap4
• USN-2464-1: linux-ti-omap4, linux-image-3.2.0-1458-omap4
• USN-2463-1: linux-image-3.2.0-75-generic, linux-image-3.2.0-75-generic-pae, linux-image-3.2.0-75-virtual, linux-image-3.2.0-75-powerpc64-smp, linux-image-3.2.0-75-omap, linux-image-3.2.0-75-highbank, linux-image-3.2.0-75-powerpc-smp, linux