USN-1567-1: Linux kernel vulnerabilities
14 September 2012
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
A flaw was found in how the Linux kernel passed the replacement session
keyring to a child process. An unprivileged local user could exploit this
flaw to cause a denial of service (panic). (CVE-2012-2745)
Ben Hutchings reported a flaw in the Linux kernel with some network drivers
that support TSO (TCP segment offload). A local or peer user could exploit
this flaw to to cause a denial of service. (CVE-2012-3412)
Jay Fenlason and Doug Ledford discovered a bug in the Linux kernel
implementation of RDS sockets. A local unprivileged user could potentially
use this flaw to read privileged information from the kernel.
(CVE-2012-3430)
A flaw was discovered in the madvise feature of the Linux kernel's memory
subsystem. An unprivileged local use could exploit the flaw to cause a
denial of service (crash the system). (CVE-2012-3511)
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-2.6.38-16-omap
-
2.6.38-16.67
-
linux-image-2.6.38-16-powerpc-smp
-
2.6.38-16.67
-
linux-image-2.6.38-16-versatile
-
2.6.38-16.67
-
linux-image-2.6.38-16-server
-
2.6.38-16.67
-
linux-image-2.6.38-16-powerpc64-smp
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2.6.38-16.67
-
linux-image-2.6.38-16-generic-pae
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2.6.38-16.67
-
linux-image-2.6.38-16-generic
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2.6.38-16.67
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linux-image-2.6.38-16-virtual
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2.6.38-16.67
-
linux-image-2.6.38-16-powerpc
-
2.6.38-16.67
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.