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Ubuntu 10.04 LTS Usn-1788-1 Critical: Local Exploit Fixes

ubuntu
Calendar Grey April 4, 2013
Scroller Ubuntu
Assess essential concerns rectified in Ubuntu 10.04 LTS through kernel enhancements that address local user vulnerabilities and system instabilities.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-backport-oneiric: Linux kernel backport from Oneiric

Details:

Emese Revfy discovered that in the Linux kernel signal handlers could leak

address information across an exec, making it possible to bypass ASLR

(Address Space Layout Randomization). A local user could use this flaw to

bypass ASLR to reliably deliver an exploit payload that would otherwise be

stopped (by ASLR). (CVE-2013-0914)

A memory use after free error was discovered in the Linux kernel's tmpfs

filesystem. A local user could exploit this flaw to gain privileges or

cause a denial of service (system crash). (CVE-2013-1767)

Mateusz Guzik discovered a race in the Linux kernel's keyring. A local user

could exploit this flaw to cause a denial of service (system crash).

(CVE-2013-1792)

Topics%20covered

Topics Covered

security advisory critical local exploit update instructions ubuntu system crash linux kernel

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-3.0.0-32-generic    3.0.0-32.51~lucid1
  linux-image-3.0.0-32-generic-pae  3.0.0-32.51~lucid1
  linux-image-3.0.0-32-server     3.0.0-32.51~lucid1
  linux-image-3.0.0-32-virtual    3.0.0-32.51~lucid1

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-1788-1

CVE-2013-0914, CVE-2013-1767, CVE-2013-1792

Severity
critical
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Critical

April 04, 2013

Topics%20covered

Topics Covered

security advisory critical local exploit update instructions ubuntu system crash linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-backport-oneiric/3.0.0-32.51~lucid1

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