USN-1768-1: Linux kernel (Quantal HWE) vulnerabilities

Releases

• Ubuntu 12.04

Packages

• linux-lts-quantal - Linux hardware enablement kernel from Quantal

Details

Andrew Cooper of Citrix reported a Xen stack corruption in the Linux
kernel. An unprivileged user in a 32bit PVOPS guest can cause the guest
kernel to crash, or operate erroneously. (CVE-2013-0190)

A failure to validate input was discovered in the Linux kernel's Xen
netback (network backend) driver. A user in a guest OS may exploit this
flaw to cause a denial of service to the guest OS and other guest domains.
(CVE-2013-0216)

A memory leak was discovered in the Linux kernel's Xen netback (network
backend) driver. A user in a guest OS could trigger this flaw to cause a
denial of service on the system. (CVE-2013-0217)

A flaw was discovered in the Linux kernel Xen PCI backend driver. If a PCI
device is assigned to the guest OS, the guest OS could exploit this flaw to
cause a denial of service on the host. (CVE-2013-0231)

A flaw was reported in the permission checks done by the Linux kernel for
/dev/cpu/*/msr. A local root user with all capabilities dropped could
exploit this flaw to execute code with full root capabilities.
(CVE-2013-0268)

Tommi Rantala discovered a flaw in the a flaw the Linux kernels handling of
datagrams packets when the MSG_PEEK flag is specified. An unprivileged
local user could exploit this flaw to cause a denial of service (system
hang). (CVE-2013-0290)

A flaw was discovered in the Linux kernel's vhost driver used to accelerate
guest networking in KVM based virtual machines. A privileged guest user
could exploit this flaw to crash the host system. (CVE-2013-0311)

A flaw was discovered in the Extended Verification Module (EVM) of the
Linux kernel. An unprivileged local user code exploit this flaw to cause a
denial of service (system crash). (CVE-2013-0313)

An information leak was discovered in the Linux kernel's Bluetooth stack
when HIDP (Human Interface Device Protocol) support is enabled. A local
unprivileged user could exploit this flaw to cause an information leak from
the kernel. (CVE-2013-0349)

Update instructions

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

Ubuntu 12.04

• linux-image-3.5.0-26-generic - 3.5.0-26.42~precise1

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-2013-0190
• CVE-2013-0216
• CVE-2013-0217
• CVE-2013-0231
• CVE-2013-0268
• CVE-2013-0290
• CVE-2013-0311
• CVE-2013-0313
• CVE-2013-0349

Related notices

• USN-1767-1: linux, linux-image-3.2.0-39-highbank, linux-image-3.2.0-39-generic, linux-image-3.2.0-39-generic-pae, linux-image-3.2.0-39-virtual, linux-image-3.2.0-39-powerpc-smp, linux-image-3.2.0-39-powerpc64-smp, linux-image-3.2.0-39-omap
• USN-1719-1: linux-image-3.0.0-31-generic, linux-image-3.0.0-31-virtual, linux-lts-backport-oneiric, linux-image-3.0.0-31-server, linux-image-3.0.0-31-generic-pae
• USN-1769-1: linux, linux-image-3.5.0-26-highbank, linux-image-3.5.0-26-generic, linux-image-3.5.0-26-omap, linux-image-3.5.0-26-powerpc-smp, linux-image-3.5.0-26-powerpc64-smp
• USN-1728-1: linux-image-2.6.32-350-ec2, linux-ec2
• USN-1774-1: linux-ti-omap4, linux-image-3.5.0-221-omap4
• USN-1725-1: linux-image-2.6.32-45-ia64, linux, linux-image-2.6.32-45-lpia, linux-image-2.6.32-45-sparc64-smp, linux-image-2.6.32-45-generic, linux-image-2.6.32-45-server, linux-image-2.6.32-45-386, linux-image-2.6.32-45-virtual, linux-image-2.6.32-45-powerpc64-smp, linux-image-2.6.32-45-sparc64, linux-image-2.6.32-45-preempt, linux-image-2.6.32-45-powerpc, linux-image-2.6.32-45-generic-pae, linux-image-2.6.32-45-versatile, linux-image-2.6.32-45-powerpc-smp
• USN-1720-1: linux, linux-image-3.0.0-31-omap, linux-image-3.0.0-31-generic, linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-powerpc64-smp, linux-image-3.0.0-31-powerpc, linux-image-3.0.0-31-generic-pae, linux-image-3.0.0-31-server, linux-image-3.0.0-31-powerpc-smp
• USN-1756-1: linux, linux-image-3.0.0-32-powerpc, linux-image-3.0.0-32-generic, linux-image-3.0.0-32-powerpc64-smp, linux-image-3.0.0-32-generic-pae, linux-image-3.0.0-32-omap, linux-image-3.0.0-32-virtual, linux-image-3.0.0-32-powerpc-smp, linux-image-3.0.0-32-server
• USN-1760-1: linux-image-3.0.0-32-generic, linux-lts-backport-oneiric, linux-image-3.0.0-32-generic-pae, linux-image-3.0.0-32-virtual, linux-image-3.0.0-32-server
• USN-1781-1: linux-image-3.2.0-1427-omap4, linux-ti-omap4
• USN-1776-1: linux-image-2.6.32-351-ec2, linux-ec2
• USN-1775-1: linux, linux-image-2.6.32-46-versatile, linux-image-2.6.32-46-386, linux-image-2.6.32-46-server, linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-powerpc, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-generic-pae, linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-generic, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-powerpc-smp, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-powerpc64-smp
• USN-1778-1: linux-ti-omap4, linux-image-3.0.0-1222-omap4
• USN-1805-1: linux, linux-image-2.6.32-46-versatile, linux-image-2.6.32-46-386, linux-image-2.6.32-46-server, linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-powerpc, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-generic-pae, linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-generic, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-powerpc-smp, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-powerpc64-smp
• USN-1808-1: linux-image-2.6.32-351-ec2, linux-ec2