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Ubuntu 13.04 USN-1974-1 Critical: Kernel Security Flaws

ubuntu
Calendar Grey September 27, 2013
Scroller Ubuntu
Security Bulletin USN-1974-2 addresses various vulnerabilities in the Ubuntu kernel that might result in privilege escalation or denial of service.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Vince Weaver discovered a flaw in the perf subsystem of the Linux kernel on

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

cause a denial of service (system crash). (CVE-2013-4254)

A memory leak was discovered in the user namespace facility of the Linux

kernel. A local user could cause a denial of service (memory consumption)

via the CLONE_NEWUSER unshare call. (CVE-2013-4205)

Topics%20covered

Topics Covered

security advisory denial of service security issue privilege escalation kernel system update ubuntu

Update Instructions

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

Ubuntu 13.04:
  linux-image-3.8.0-31-generic    3.8.0-31.46

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-1974-1

CVE-2013-4205, CVE-2013-4254

Severity
critical
Lowest
Low
Medium
High
Critical

September 27, 2013

Topics%20covered

Topics Covered

security advisory denial of service security issue privilege escalation kernel system update ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/3.8.0-31.46

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