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Ubuntu 12.04 LTS: USN-1845-1 Critical: Linux Kernel Denial Of Service

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Calendar Grey May 30, 2013
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Unapproved network activity may result in server malfunctions or possible administrative exposure. Essential tips for Ubuntu administrators.
The system could be made to crash or run programs as an administrator if it received specially crafted network traffic.

Summary

The system could be made to crash or run programs as an administrator if

it received specially crafted network traffic.

Software Description:

- linux-lts-quantal: Linux hardware enablement kernel from Quantal

Details:

Kees Cook discovered a flaw in the Linux kernel's iSCSI subsystem. A remote

unauthenticated attacker could exploit this flaw to cause a denial of

service (system crash) or potentially gain administrative privileges.

Topics%20covered

Topics Covered

security advisory denial of service ubuntu system crash linux kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.5.0-32-generic    3.5.0-32.53~precise1

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

https://ubuntu.com/security/notices/USN-1845-1

CVE-2013-2850

Severity
critical
Lowest
Low
Medium
High
Critical

May 30, 2013

Topics%20covered

Topics Covered

security advisory denial of service ubuntu system crash linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-32.53~precise1

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