Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 492
Alerts This Week
Warning Icon 1 492

Ubuntu 10.04 LTS USN-1574-1 Critical Denial of Service Threats

ubuntu
Calendar Grey September 19, 2012
Scroller Ubuntu
Essential Ubuntu Bulletin USN-1574-1 underscores kernel vulnerabilities necessitating urgent patches to avert potential local exploitation risks.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-backport-natty: Linux kernel backport from Natty

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-20...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical threat kernel system update ubuntu

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.38-16-generic   2.6.38-16.67~lucid1
  linux-image-2.6.38-16-generic-pae  2.6.38-16.67~lucid1
  linux-image-2.6.38-16-server    2.6.38-16.67~lucid1
  linux-image-2.6.38-16-virtual   2.6.38-16.67~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-1574-1

CVE-2012-2745, CVE-2012-3412, CVE-2012-3430, CVE-2012-3511

Severity
critical
Lowest
Low
Medium
High
Critical

September 19, 2012

Topics%20covered

Topics Covered

security advisory denial of service critical threat kernel system update ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-backport-natty/2.6.38-16.67~lucid1

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.