USN-1610-1: Linux kernel vulnerability

Releases

• Ubuntu 12.04

Packages

• linux - Linux kernel

Details

Pablo Neira Ayuso discovered a flaw in the credentials of netlink messages.
An unprivileged local attacker could exploit this by getting a netlink
based service, that relies on netlink credentials, to perform privileged
actions. (CVE-2012-3520)

Mathias Krause discovered information leak in the Linux kernel's compat
ioctl interface. A local user could exploit the flaw to examine parts of
kernel stack memory (CVE-2012-6539)

Mathias Krause discovered an information leak in the Linux kernel's
getsockopt for IP_VS_SO_GET_TIMEOUT. A local user could exploit this flaw
to examine parts of kernel stack memory. (CVE-2012-6540)

Mathias Krause discovered an information leak in the Linux kernel's
getsockopt implementation for the Datagram Congestion Control Protocol
(DCCP). A local user could exploit this flaw to examine some of the
kernel's stack memory. (CVE-2012-6541)

Mathias Krause discovered an information leak in the Linux kernel's
getsockname implementation for Logical Link Layer (llc) sockets. A local
user could exploit this flaw to examine some of the kernel's stack memory.
(CVE-2012-6542)

Mathias Krause discovered information leaks in the Linux kernel's Bluetooth
Logical Link Control and Adaptation Protocol (L2CAP) implementation. A
local user could exploit these flaws to examine some of the kernel's stack
memory. (CVE-2012-6544)

Mathias Krause discovered information leaks in the Linux kernel's Bluetooth
RFCOMM protocol implementation. A local user could exploit these flaws to
examine parts of kernel memory. (CVE-2012-6545)

Mathias Krause discovered information leaks in the Linux kernel's
Asynchronous Transfer Mode (ATM) networking stack. A local user could
exploit these flaws to examine some parts of kernel memory. (CVE-2012-6546)

A flaw was discovered in how netlink sockets validate message origins. A
local attacker could exploit this flaw to send netlink message
notifications, with spoofed credentials, to subscribed tasks.
(CVE-2012-6689)

Mathias Krause discover an error in Linux kernel's Datagram Congestion
Control Protocol (DCCP) Congestion Control Identifier (CCID) use. A local
attack could exploit this flaw to cause a denial of service (crash) and
potentially escalate privileges if the user can mmap page 0.
(CVE-2013-1827)

Update instructions

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

Ubuntu 12.04

• linux-image-3.2.0-32-omap - 3.2.0-32.51
• linux-image-3.2.0-32-powerpc-smp - 3.2.0-32.51
• linux-image-3.2.0-32-highbank - 3.2.0-32.51
• linux-image-3.2.0-32-powerpc64-smp - 3.2.0-32.51
• linux-image-3.2.0-32-generic-pae - 3.2.0-32.51
• linux-image-3.2.0-32-virtual - 3.2.0-32.51
• linux-image-3.2.0-32-generic - 3.2.0-32.51

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-2012-3520
• CVE-2012-6539
• CVE-2012-6540
• CVE-2012-6541
• CVE-2012-6542
• CVE-2012-6544
• CVE-2012-6545
• CVE-2012-6546
• CVE-2012-6689
• CVE-2013-1827

Related notices

• USN-1599-1: linux-ti-omap4, linux-image-3.2.0-1420-omap4
• USN-1648-1: linux-image-3.0.0-28-powerpc-smp, linux-image-3.0.0-28-server, linux-image-3.0.0-28-virtual, linux-image-3.0.0-28-omap, linux, linux-image-3.0.0-28-powerpc, linux-image-3.0.0-28-generic, linux-image-3.0.0-28-powerpc64-smp, linux-image-3.0.0-28-generic-pae
• USN-1649-1: linux-ti-omap4, linux-image-3.0.0-1218-omap4
• USN-1798-1: linux-ec2, linux-image-2.6.32-351-ec2
• USN-1792-1: linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-versatile, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-generic, linux-image-2.6.32-46-server, linux-image-2.6.32-46-powerpc, linux-image-2.6.32-46-powerpc-smp, linux, linux-image-2.6.32-46-powerpc64-smp, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-386, linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-generic-pae
• USN-1652-1: linux-image-3.0.0-28-generic-pae, linux-image-3.0.0-28-virtual, linux-lts-backport-oneiric, linux-image-3.0.0-28-generic, linux-image-3.0.0-28-server
• USN-1805-1: linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-versatile, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-generic, linux-image-2.6.32-46-server, linux-image-2.6.32-46-powerpc, linux-image-2.6.32-46-powerpc-smp, linux, linux-image-2.6.32-46-powerpc64-smp, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-386, linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-generic-pae
• USN-1808-1: linux-ec2, linux-image-2.6.32-351-ec2
• USN-1653-1: linux-ec2, linux-image-2.6.32-350-ec2
• USN-1607-1: linux-image-3.0.0-26-generic, linux-image-3.0.0-26-powerpc-smp, linux-image-3.0.0-26-powerpc, linux-image-3.0.0-26-generic-pae, linux-image-3.0.0-26-server, linux-image-3.0.0-26-powerpc64-smp, linux, linux-image-3.0.0-26-omap, linux-image-3.0.0-26-virtual
• USN-1651-1: linux-image-2.6.32-45-ia64, linux-image-2.6.32-45-386, linux-image-2.6.32-45-sparc64-smp, linux-image-2.6.32-45-virtual, linux-image-2.6.32-45-powerpc-smp, linux-image-2.6.32-45-generic-pae, linux-image-2.6.32-45-powerpc, linux-image-2.6.32-45-sparc64, linux-image-2.6.32-45-powerpc64-smp, linux, linux-image-2.6.32-45-preempt, linux-image-2.6.32-45-lpia, linux-image-2.6.32-45-generic, linux-image-2.6.32-45-server, linux-image-2.6.32-45-versatile
• USN-1594-1: linux-image-3.0.0-26-generic, linux-image-3.0.0-26-generic-pae, linux-lts-backport-oneiric, linux-image-3.0.0-26-server, linux-image-3.0.0-26-virtual
• USN-1609-1: linux-image-3.0.0-1216-omap4, linux-ti-omap4