USN-1445-1: Linux kernel vulnerabilities
18 May 2012
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
A flaw was found in the Linux's kernels ext4 file system when mounted with
a journal. A local, unprivileged user could exploit this flaw to cause a
denial of service. (CVE-2011-4086)
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)
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)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 10.04
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linux-image-2.6.32-41-server
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2.6.32-41.89
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linux-image-2.6.32-41-preempt
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2.6.32-41.89
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linux-image-2.6.32-41-ia64
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2.6.32-41.89
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linux-image-2.6.32-41-generic-pae
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2.6.32-41.89
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linux-image-2.6.32-41-386
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2.6.32-41.89
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linux-image-2.6.32-41-generic
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2.6.32-41.89
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linux-image-2.6.32-41-powerpc
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2.6.32-41.89
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linux-image-2.6.32-41-sparc64
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2.6.32-41.89
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linux-image-2.6.32-41-sparc64-smp
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2.6.32-41.89
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linux-image-2.6.32-41-powerpc-smp
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2.6.32-41.89
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linux-image-2.6.32-41-virtual
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2.6.32-41.89
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linux-image-2.6.32-41-powerpc64-smp
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2.6.32-41.89
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linux-image-2.6.32-41-versatile
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2.6.32-41.89
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linux-image-2.6.32-41-lpia
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2.6.32-41.89
After a standard system update you need to reboot your computer to make
all the necessary changes.