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Ubuntu 12.04 LTS USN-1448-1 Critical Denial Of Service Flaw

ubuntu
Calendar Grey May 21, 2012
Scroller Ubuntu
Multiple vulnerabilities addressed in Fedora 34. Upgrade advised for performance improvements.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

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)

Topics%20covered

Topics Covered

security advisory denial of service critical kernel system update ubuntu local user

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-24-generic    3.2.0-24.38
  linux-image-3.2.0-24-generic-pae  3.2.0-24.38
  linux-image-3.2.0-24-omap       3.2.0-24.38
  linux-image-3.2.0-24-powerpc-smp  3.2.0-24.38
  linux-image-3.2.0-24-powerpc64-smp  3.2.0-24.38
  linux-image-3.2.0-24-virtual    3.2.0-24.38

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-1448-1

CVE-2012-1601, CVE-2012-2123

Severity
critical
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Critical

May 21, 2012

Topics%20covered

Topics Covered

security advisory denial of service critical kernel system update ubuntu local user

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-24.38

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