USN-1457-1: Linux kernel vulnerabilities

Releases

• Ubuntu 11.04

Packages

• linux - Linux kernel

Details

Andy Adamson discovered a flaw in the Linux kernel's NFSv4 implementation.
A remote NFS server (attacker) could exploit this flaw to cause a denial of
service. (CVE-2011-4131)

A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual
cpu setup. An unprivileged local user could exploit this flaw to crash the
system leading to a denial of service. (CVE-2012-1601)

A flaw was discovered in the Linux kernel's KVM (kernel virtual machine).
An administrative user in the guest OS could leverage this flaw to cause a
denial of service in the host OS. (CVE-2012-2121)

Steve Grubb reported a flaw with Linux fscaps (file system base
capabilities) when used to increase the permissions of a process. For
application on which fscaps are in use a local attacker can disable address
space randomization to make attacking the process with raised privileges
easier. (CVE-2012-2123)

Schacher Raindel discovered a flaw in the Linux kernel's memory handling
when hugetlb is enabled. An unprivileged local attacker could exploit this
flaw to cause a denial of service and potentially gain higher privileges.
(CVE-2012-2133)

Update instructions

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

Ubuntu 11.04

• linux-image-2.6.38-15-powerpc - 2.6.38-15.60
• linux-image-2.6.38-15-omap - 2.6.38-15.60
• linux-image-2.6.38-15-generic-pae - 2.6.38-15.60
• linux-image-2.6.38-15-server - 2.6.38-15.60
• linux-image-2.6.38-15-powerpc64-smp - 2.6.38-15.60
• linux-image-2.6.38-15-virtual - 2.6.38-15.60
• linux-image-2.6.38-15-versatile - 2.6.38-15.60
• linux-image-2.6.38-15-generic - 2.6.38-15.60
• linux-image-2.6.38-15-powerpc-smp - 2.6.38-15.60

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

References

• CVE-2011-4131
• CVE-2012-1601
• CVE-2012-2121
• CVE-2012-2123
• CVE-2012-2133

Related notices

• USN-1476-1: linux-image-3.0.0-1211-omap4, linux-ti-omap4
• USN-1470-1: linux-image-2.6.38-15-generic-pae, linux-lts-backport-natty, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-server
• USN-1472-1: linux-image-3.0.0-21-powerpc64-smp, linux-image-3.0.0-21-virtual, linux-image-3.0.0-21-omap, linux-image-3.0.0-21-powerpc-smp, linux-image-3.0.0-21-generic, linux-image-3.0.0-21-powerpc, linux-image-3.0.0-21-generic-pae, linux, linux-image-3.0.0-21-server
• USN-1471-1: linux-lts-backport-oneiric, linux-image-3.0.0-21-generic, linux-image-3.0.0-21-virtual, linux-image-3.0.0-21-generic-pae, linux-image-3.0.0-21-server
• USN-1530-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
• USN-1453-1: linux-ec2, linux-image-2.6.32-345-ec2
• USN-1452-1: linux-image-3.0.0-20-server, linux-image-3.0.0-20-powerpc64-smp, linux-image-3.0.0-20-virtual, linux-image-3.0.0-20-generic-pae, linux-image-3.0.0-20-omap, linux-image-3.0.0-20-generic, linux-image-3.0.0-20-powerpc-smp, linux, linux-image-3.0.0-20-powerpc
• USN-1448-1: linux-image-3.2.0-24-powerpc-smp, linux-image-3.2.0-24-omap, linux-image-3.2.0-24-generic, linux-image-3.2.0-24-powerpc64-smp, linux-image-3.2.0-24-virtual, linux, linux-image-3.2.0-24-generic-pae
• USN-1459-1: linux-image-3.0.0-1210-omap4, linux-ti-omap4
• USN-1460-1: linux-image-3.2.0-1413-omap4, linux-ti-omap4
• USN-1507-1: linux-image-2.6.24-32-server, linux-image-2.6.24-32-lpia, linux-image-2.6.24-32-powerpc-smp, linux-image-2.6.24-32-openvz, linux, linux-image-2.6.24-32-mckinley, linux-image-2.6.24-32-386, linux-image-2.6.24-32-xen, linux-image-2.6.24-32-hppa32, linux-image-2.6.24-32-sparc64, linux-image-2.6.24-32-virtual, linux-image-2.6.24-32-powerpc, linux-image-2.6.24-32-hppa64, linux-image-2.6.24-32-generic, linux-image-2.6.24-32-powerpc64-smp, linux-image-2.6.24-32-itanium, linux-image-2.6.24-32-lpiacompat, linux-image-2.6.24-32-rt, linux-image-2.6.24-32-sparc64-smp
• USN-1455-1: linux-image-3.0.0-20-server, linux-lts-backport-oneiric, linux-image-3.0.0-20-generic-pae, linux-image-3.0.0-20-generic, linux-image-3.0.0-20-virtual
• USN-1445-1: linux-image-2.6.32-41-sparc64, linux-image-2.6.32-41-sparc64-smp, linux-image-2.6.32-41-preempt, linux-image-2.6.32-41-versatile, linux-image-2.6.32-41-generic-pae, linux-image-2.6.32-41-ia64, linux-image-2.6.32-41-virtual, linux-image-2.6.32-41-386, linux-image-2.6.32-41-lpia, linux-image-2.6.32-41-powerpc64-smp, linux-image-2.6.32-41-powerpc-smp, linux-image-2.6.32-41-generic, linux-image-2.6.32-41-server, linux, linux-image-2.6.32-41-powerpc
• USN-1474-1: linux-ti-omap4, linux-image-3.2.0-1414-omap4
• USN-2037-1: linux-ec2, linux-image-2.6.32-359-ec2
• USN-1473-1: linux-image-3.2.0-25-powerpc-smp, linux-image-3.2.0-25-highbank, linux-image-3.2.0-25-generic, linux-image-3.2.0-25-generic-pae, linux-image-3.2.0-25-powerpc64-smp, linux-image-3.2.0-25-virtual, linux, linux-image-3.2.0-25-omap
• USN-1577-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
• USN-2036-1: linux-image-2.6.32-54-generic-pae, linux-image-2.6.32-54-sparc64, linux-image-2.6.32-54-ia64, linux-image-2.6.32-54-386, linux-image-2.6.32-54-preempt, linux-image-2.6.32-54-versatile, linux-image-2.6.32-54-virtual, linux-image-2.6.32-54-powerpc-smp, linux-image-2.6.32-54-sparc64-smp, linux-image-2.6.32-54-lpia, linux-image-2.6.32-54-powerpc64-smp, linux-image-2.6.32-54-powerpc, linux-image-2.6.32-54-generic, linux-image-2.6.32-54-server, linux
• USN-1469-1: linux-ec2, linux-image-2.6.32-345-ec2
• USN-1468-1: linux-image-2.6.32-41-sparc64, linux-image-2.6.32-41-sparc64-smp, linux-image-2.6.32-41-preempt, linux-image-2.6.32-41-versatile, linux-image-2.6.32-41-generic-pae, linux-image-2.6.32-41-ia64, linux-image-2.6.32-41-virtual, linux-image-2.6.32-41-386, linux-image-2.6.32-41-lpia, linux-image-2.6.32-41-powerpc64-smp, linux-image-2.6.32-41-powerpc-smp, linux-image-2.6.32-41-generic, linux-image-2.6.32-41-server, linux, linux-image-2.6.32-41-powerpc