USN-1457-1: Linux kernel vulnerabilities
31 May 2012
Several security issues were fixed in the kernel.
Releases
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
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linux-image-2.6.38-15-powerpc
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2.6.38-15.60
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linux-image-2.6.38-15-omap
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2.6.38-15.60
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linux-image-2.6.38-15-generic-pae
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2.6.38-15.60
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linux-image-2.6.38-15-server
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2.6.38-15.60
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linux-image-2.6.38-15-powerpc64-smp
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2.6.38-15.60
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linux-image-2.6.38-15-virtual
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2.6.38-15.60
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linux-image-2.6.38-15-versatile
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2.6.38-15.60
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linux-image-2.6.38-15-generic
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2.6.38-15.60
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linux-image-2.6.38-15-powerpc-smp
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2.6.38-15.60
After a standard system update you need to reboot your computer to make
all the necessary changes.