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USN-1216-1: Linux kernel (EC2) vulnerabilities

26 September 2011

Multiple kernel flaws have been fixed.

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Releases

Packages

Details

Dan Rosenberg discovered that multiple terminal ioctls did not correctly
initialize structure memory. A local attacker could exploit this to read
portions of kernel stack memory, leading to a loss of privacy.
(CVE-2010-4076, CVE-2010-4077)

Alex Shi and Eric Dumazet discovered that the network stack did not
correctly handle packet backlogs. A remote attacker could exploit this by
sending a large amount of network traffic to cause the system to run out of
memory, leading to a denial of service. (CVE-2010-4251, CVE-2010-4805)

It was discovered that the /proc filesystem did not correctly handle
permission changes when programs executed. A local attacker could hold open
files to examine details about programs running with higher privileges,
potentially increasing the chances of exploiting additional
vulnerabilities. (CVE-2011-1020)

Dan Rosenberg discovered that the X.25 Rose network stack did not correctly
handle certain fields. If a system was running with Rose enabled, a remote
attacker could send specially crafted traffic to gain root privileges.
(CVE-2011-1493)

Timo Warns discovered that the GUID partition parsing routines did not
correctly validate certain structures. A local attacker with physical
access could plug in a specially crafted block device to crash the system,
leading to a denial of service. (CVE-2011-1577)

It was discovered that CIFS incorrectly handled authentication. When a user
had a CIFS share mounted that required authentication, a local user could
mount the same share without knowing the correct password. (CVE-2011-1585)

It was discovered that the GRE protocol incorrectly handled netns
initialization. A remote attacker could send a packet while the ip_gre
module was loading, and crash the system, leading to a denial of service.
(CVE-2011-1767)

It was discovered that the IP/IP protocol incorrectly handled netns
initialization. A remote attacker could send a packet while the ipip module
was loading, and crash the system, leading to a denial of service.
(CVE-2011-1768)

Ben Hutchings reported a flaw in the kernel's handling of corrupt LDM
partitions. A local user could exploit this to cause a denial of service or
escalate privileges. (CVE-2011-2182)

Andrea Righi discovered a race condition in the KSM memory merging support.
If KSM was being used, a local attacker could exploit this to crash the
system, leading to a denial of service. (CVE-2011-2183)

Dan Rosenberg discovered that the IPv4 diagnostic routines did not
correctly validate certain requests. A local attacker could exploit this to
consume CPU resources, leading to a denial of service. (CVE-2011-2213)

Vasiliy Kulikov discovered that taskstats listeners were not correctly
handled. A local attacker could expoit this to exhaust memory and CPU
resources, leading to a denial of service. (CVE-2011-2484)

It was discovered that Bluetooth l2cap and rfcomm did not correctly
initialize structures. A local attacker could exploit this to read portions
of the kernel stack, leading to a loss of privacy. (CVE-2011-2492)

Mauro Carvalho Chehab discovered that the si4713 radio driver did not
correctly check the length of memory copies. If this hardware was
available, a local attacker could exploit this to crash the system or gain
root privileges. (CVE-2011-2700)

Herbert Xu discovered that certain fields were incorrectly handled when
Generic Receive Offload (CVE-2011-2723)

Vasiliy Kulikov discovered that the Comedi driver did not correctly clear
memory. A local attacker could exploit this to read kernel stack memory,
leading to a loss of privacy. (CVE-2011-2909)

The performance counter subsystem did not correctly handle certain
counters. A local attacker could exploit this to crash the system, leading
to a denial of service. (CVE-2011-2918)

A flaw was found in the Linux kernel's /proc//map* interface. A local,
unprivileged user could exploit this flaw to cause a denial of service.
(CVE-2011-3637)

Ben Hutchings discovered several flaws in the Linux Rose (X.25 PLP) layer.
A local user or a remote user on an X.25 network could exploit these flaws
to execute arbitrary code as root. (CVE-2011-4914)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 10.04

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

Related notices

  • USN-1089-1: linux-image-2.6.31-23-sparc64, linux-image-2.6.31-23-virtual, linux, linux-image-2.6.31-23-powerpc, linux-image-2.6.31-23-generic-pae, linux-image-2.6.31-23-powerpc-smp, linux-image-2.6.31-23-generic, linux-image-2.6.31-308-ec2, linux-image-2.6.31-23-ia64, linux-image-2.6.31-23-lpia, linux-image-2.6.31-23-powerpc64-smp, linux-ec2, linux-image-2.6.31-23-386, linux-image-2.6.31-23-sparc64-smp, linux-image-2.6.31-23-server
  • USN-1202-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1203-1: linux-mvl-dove, linux-image-2.6.32-218-dove
  • USN-1183-1: linux-image-2.6.35-30-generic-pae, linux, linux-image-2.6.35-30-server, linux-image-2.6.35-30-powerpc-smp, linux-image-2.6.35-30-versatile, linux-image-2.6.35-30-powerpc, linux-image-2.6.35-30-virtual, linux-image-2.6.35-30-powerpc64-smp, linux-image-2.6.35-30-omap, linux-image-2.6.35-30-generic
  • USN-1170-1: linux-image-2.6.24-29-hppa32, linux-image-2.6.24-29-lpiacompat, linux-image-2.6.24-29-lpia, linux-image-2.6.24-29-sparc64, linux-image-2.6.24-29-rt, linux-image-2.6.24-29-server, linux-image-2.6.24-29-386, linux-image-2.6.24-29-virtual, linux-image-2.6.24-29-itanium, linux-image-2.6.24-29-powerpc64-smp, linux-image-2.6.24-29-powerpc-smp, linux-image-2.6.24-29-generic, linux-image-2.6.24-29-xen, linux, linux-image-2.6.24-29-openvz, linux-image-2.6.24-29-powerpc, linux-image-2.6.24-29-mckinley, linux-image-2.6.24-29-sparc64-smp, linux-image-2.6.24-29-hppa64
  • USN-1218-1: linux, linux-image-2.6.32-34-ia64, linux-image-2.6.32-34-powerpc64-smp, linux-image-2.6.32-34-386, linux-image-2.6.32-34-generic-pae, linux-image-2.6.32-34-powerpc-smp, linux-image-2.6.32-34-powerpc, linux-image-2.6.32-34-server, linux-image-2.6.32-34-virtual, linux-image-2.6.32-34-generic, linux-image-2.6.32-34-sparc64, linux-image-2.6.32-34-preempt, linux-image-2.6.32-34-versatile, linux-image-2.6.32-34-sparc64-smp, linux-image-2.6.32-34-lpia
  • USN-1204-1: linux-fsl-imx51, linux-image-2.6.31-610-imx51
  • USN-1208-1: linux-image-2.6.32-418-dove, linux-mvl-dove
  • USN-1187-1: linux-image-2.6.35-30-generic-pae, linux-image-2.6.35-30-server, linux-image-2.6.35-30-virtual, linux-lts-backport-maverick, linux-image-2.6.35-30-generic
  • USN-1092-1: linux-image-2.6.15-57-powerpc, linux-image-2.6.15-57-amd64-generic, linux-image-2.6.15-57-powerpc64-smp, linux-image-2.6.15-57-amd64-k8, linux-image-2.6.15-57-sparc64-smp, linux-image-2.6.15-57-server-bigiron, linux-image-2.6.15-57-powerpc-smp, linux-image-2.6.15-57-amd64-server, linux-image-2.6.15-57-mckinley, linux-image-2.6.15-57-386, linux-image-2.6.15-57-hppa32-smp, linux-image-2.6.15-57-itanium, linux-image-2.6.15-57-amd64-xeon, linux-source-2.6.15, linux-image-2.6.15-57-hppa32, linux-image-2.6.15-57-mckinley-smp, linux-image-2.6.15-57-itanium-smp, linux-image-2.6.15-57-hppa64-smp, linux-image-2.6.15-57-sparc64, linux-image-2.6.15-57-server, linux-image-2.6.15-57-hppa64, linux-image-2.6.15-57-686, linux-image-2.6.15-57-k7
  • USN-1205-1: linux-image-2.6.35-30-generic-pae, linux-image-2.6.35-30-server, linux-image-2.6.35-30-virtual, linux-lts-backport-maverick, linux-image-2.6.35-30-generic
  • USN-1189-1: linux-image-2.6.24-29-hppa32, linux-image-2.6.24-29-lpiacompat, linux-image-2.6.24-29-lpia, linux-image-2.6.24-29-sparc64, linux-image-2.6.24-29-rt, linux-image-2.6.24-29-server, linux-image-2.6.24-29-386, linux-image-2.6.24-29-virtual, linux-image-2.6.24-29-itanium, linux-image-2.6.24-29-powerpc64-smp, linux-image-2.6.24-29-powerpc-smp, linux-image-2.6.24-29-generic, linux-image-2.6.24-29-xen, linux, linux-image-2.6.24-29-openvz, linux-image-2.6.24-29-powerpc, linux-image-2.6.24-29-mckinley, linux-image-2.6.24-29-sparc64-smp, linux-image-2.6.24-29-hppa64
  • USN-1211-1: linux, linux-image-2.6.38-11-powerpc, linux-image-2.6.38-11-powerpc-smp, linux-image-2.6.38-11-generic, linux-image-2.6.38-11-server, linux-image-2.6.38-11-omap, linux-image-2.6.38-11-versatile, linux-image-2.6.38-11-virtual, linux-image-2.6.38-11-generic-pae, linux-image-2.6.38-11-powerpc64-smp
  • USN-1256-1: linux-image-2.6.38-12-server, linux-image-2.6.38-12-virtual, linux-lts-backport-natty, linux-image-2.6.38-12-generic-pae, linux-image-2.6.38-12-generic
  • USN-1201-1: linux-image-2.6.35-30-generic-pae, linux, linux-image-2.6.35-30-server, linux-image-2.6.35-30-powerpc-smp, linux-image-2.6.35-30-versatile, linux-image-2.6.35-30-powerpc, linux-image-2.6.35-30-virtual, linux-image-2.6.35-30-powerpc64-smp, linux-image-2.6.35-30-omap, linux-image-2.6.35-30-generic
  • USN-1212-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
  • USN-1193-1: linux, linux-image-2.6.38-11-powerpc, linux-image-2.6.38-11-powerpc-smp, linux-image-2.6.38-11-generic, linux-image-2.6.38-11-server, linux-image-2.6.38-11-omap, linux-image-2.6.38-11-versatile, linux-image-2.6.38-11-virtual, linux-image-2.6.38-11-generic-pae, linux-image-2.6.38-11-powerpc64-smp
  • USN-1272-1: linux-image-2.6.35-31-powerpc64-smp, linux-image-2.6.35-31-versatile, linux, linux-image-2.6.35-31-generic, linux-image-2.6.35-31-generic-pae, linux-image-2.6.35-31-powerpc-smp, linux-image-2.6.35-31-powerpc, linux-image-2.6.35-31-virtual, linux-image-2.6.35-31-server, linux-image-2.6.35-31-omap
  • USN-1280-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1268-1: linux-image-2.6.24-30-powerpc64-smp, linux-image-2.6.24-30-itanium, linux-image-2.6.24-30-server, linux-image-2.6.24-30-hppa32, linux-image-2.6.24-30-lpia, linux-image-2.6.24-30-generic, linux-image-2.6.24-30-virtual, linux-image-2.6.24-30-powerpc, linux-image-2.6.24-30-xen, linux-image-2.6.24-30-rt, linux-image-2.6.24-30-mckinley, linux, linux-image-2.6.24-30-openvz, linux-image-2.6.24-30-lpiacompat, linux-image-2.6.24-30-386, linux-image-2.6.24-30-sparc64, linux-image-2.6.24-30-sparc64-smp, linux-image-2.6.24-30-hppa64, linux-image-2.6.24-30-powerpc-smp
  • USN-1278-1: linux-image-2.6.35-31-generic, linux-image-2.6.35-31-generic-pae, linux-lts-backport-maverick, linux-image-2.6.35-31-virtual, linux-image-2.6.35-31-server
  • USN-1271-1: linux-fsl-imx51, linux-image-2.6.31-612-imx51
  • USN-1341-1: linux-image-2.6.35-32-powerpc-smp, linux-image-2.6.35-32-omap, linux, linux-image-2.6.35-32-generic-pae, linux-image-2.6.35-32-versatile, linux-image-2.6.35-32-server, linux-image-2.6.35-32-powerpc, linux-image-2.6.35-32-virtual, linux-image-2.6.35-32-generic, linux-image-2.6.35-32-powerpc64-smp
  • USN-1332-1: linux-image-2.6.35-32-generic-pae, linux-lts-backport-maverick, linux-image-2.6.35-32-server, linux-image-2.6.35-32-virtual, linux-image-2.6.35-32-generic
  • USN-1383-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
  • USN-1392-1: linux-fsl-imx51, linux-image-2.6.31-612-imx51
  • USN-1394-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1390-1: linux-image-2.6.24-31-hppa64, linux-image-2.6.24-31-powerpc, linux-image-2.6.24-31-itanium, linux-image-2.6.24-31-386, linux-image-2.6.24-31-hppa32, linux-image-2.6.24-31-server, linux-image-2.6.24-31-powerpc-smp, linux-image-2.6.24-31-lpiacompat, linux-image-2.6.24-31-powerpc64-smp, linux-image-2.6.24-31-openvz, linux-image-2.6.24-31-generic, linux-image-2.6.24-31-lpia, linux-image-2.6.24-31-mckinley, linux-image-2.6.24-31-sparc64, linux, linux-image-2.6.24-31-virtual, linux-image-2.6.24-31-rt, linux-image-2.6.24-31-xen, linux-image-2.6.24-31-sparc64-smp
  • USN-1281-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
  • USN-1285-1: linux-image-2.6.38-13-server, linux-image-2.6.38-13-powerpc-smp, linux-image-2.6.38-13-versatile, linux, linux-image-2.6.38-13-omap, linux-image-2.6.38-13-generic, linux-image-2.6.38-13-generic-pae, linux-image-2.6.38-13-powerpc, linux-image-2.6.38-13-virtual, linux-image-2.6.38-13-powerpc64-smp
  • USN-1279-1: linux-image-2.6.38-13-server, linux-image-2.6.38-13-generic, linux-image-2.6.38-13-generic-pae, linux-image-2.6.38-13-virtual, linux-lts-backport-natty
  • USN-1244-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1241-1: linux-fsl-imx51, linux-image-2.6.31-611-imx51
  • USN-1219-1: linux-image-2.6.35-30-generic-pae, linux-image-2.6.35-30-server, linux-image-2.6.35-30-virtual, linux-lts-backport-maverick, linux-image-2.6.35-30-generic
  • USN-1228-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
  • USN-1246-1: linux, linux-image-2.6.38-12-powerpc64-smp, linux-image-2.6.38-12-powerpc-smp, linux-image-2.6.38-12-powerpc, linux-image-2.6.38-12-server, linux-image-2.6.38-12-omap, linux-image-2.6.38-12-virtual, linux-image-2.6.38-12-generic-pae, linux-image-2.6.38-12-generic, linux-image-2.6.38-12-versatile
  • USN-1220-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1227-1: linux-image-2.6.35-30-generic-pae, linux, linux-image-2.6.35-30-server, linux-image-2.6.35-30-powerpc-smp, linux-image-2.6.35-30-versatile, linux-image-2.6.35-30-powerpc, linux-image-2.6.35-30-virtual, linux-image-2.6.35-30-powerpc64-smp, linux-image-2.6.35-30-omap, linux-image-2.6.35-30-generic
  • USN-1225-1: linux-image-2.6.24-29-hppa32, linux-image-2.6.24-29-lpiacompat, linux-image-2.6.24-29-lpia, linux-image-2.6.24-29-sparc64, linux-image-2.6.24-29-rt, linux-image-2.6.24-29-server, linux-image-2.6.24-29-386, linux-image-2.6.24-29-virtual, linux-image-2.6.24-29-itanium, linux-image-2.6.24-29-powerpc64-smp, linux-image-2.6.24-29-powerpc-smp, linux-image-2.6.24-29-generic, linux-image-2.6.24-29-xen, linux, linux-image-2.6.24-29-openvz, linux-image-2.6.24-29-powerpc, linux-image-2.6.24-29-mckinley, linux-image-2.6.24-29-sparc64-smp, linux-image-2.6.24-29-hppa64
  • USN-1186-1: linux-image-2.6.24-29-hppa32, linux-image-2.6.24-29-lpiacompat, linux-image-2.6.24-29-lpia, linux-image-2.6.24-29-sparc64, linux-image-2.6.24-29-rt, linux-image-2.6.24-29-server, linux-image-2.6.24-29-386, linux-image-2.6.24-29-virtual, linux-image-2.6.24-29-itanium, linux-image-2.6.24-29-powerpc64-smp, linux-image-2.6.24-29-powerpc-smp, linux-image-2.6.24-29-generic, linux-image-2.6.24-29-xen, linux, linux-image-2.6.24-29-openvz, linux-image-2.6.24-29-powerpc, linux-image-2.6.24-29-mckinley, linux-image-2.6.24-29-sparc64-smp, linux-image-2.6.24-29-hppa64
  • USN-1243-1: linux-image-2.6.35-30-generic-pae, linux, linux-image-2.6.35-30-server, linux-image-2.6.35-30-powerpc-smp, linux-image-2.6.35-30-versatile, linux-image-2.6.35-30-powerpc, linux-image-2.6.35-30-virtual, linux-image-2.6.35-30-powerpc64-smp, linux-image-2.6.35-30-omap, linux-image-2.6.35-30-generic
  • USN-1242-1: linux-image-2.6.35-30-generic-pae, linux-image-2.6.35-30-server, linux-image-2.6.35-30-virtual, linux-lts-backport-maverick, linux-image-2.6.35-30-generic

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