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 1 524
Alerts This Week
Warning Icon 1 524

Ubuntu 10.10: USN-1201-1 Critical: Multiple Kernel Flaws Addressed

ubuntu
Calendar Grey September 13, 2011
Scroller Ubuntu
A series of critical vulnerabilities in Ubuntu 10.10’s kernel have been resolved, with detailed guidance on implementing the updates available.
Multiple kernel flaws have been fixed.

Summary

Multiple kernel flaws have been fixed.

Software Description:

- linux: Linux kernel

Details:

It was discovered that the /proc filesystem did not correctly handle

permission changes when programs executed. A local attacker could hold open

files to examine details about programs running with higher privileges,

potentially increasing the chances of exploiting additional

vulnerabilities. (CVE-2011-1020)

Dan Rosenberg discovered that the X.25 Rose network stack did not correctly

handle certain fields. If a system was running with Rose enabled, a remote

attacker could send specially crafted traffic to gain root privileges.

(CVE-2011-1493)

Dan Rosenberg discovered that the DCCP stack did not correctly handle

certain packet structures. A remote attacker could exploit this to crash

the system, leading to a denial of service. (CVE-2011-1770)

Vasiliy Kulikov discovered that taskstats listeners were not correctly

handled. A local attacker could expoit this to exhau...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical remote attack Ubuntu kernel permission issue

Update Instructions

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

Ubuntu 10.10:
  linux-image-2.6.35-30-generic   2.6.35-30.59
  linux-image-2.6.35-30-generic-pae  2.6.35-30.59
  linux-image-2.6.35-30-omap      2.6.35-30.59
  linux-image-2.6.35-30-powerpc   2.6.35-30.59
  linux-image-2.6.35-30-powerpc-smp  2.6.35-30.59
  linux-image-2.6.35-30-powerpc64-smp  2.6.35-30.59
  linux-image-2.6.35-30-server    2.6.35-30.59
  linux-image-2.6.35-30-versatile  2.6.35-30.59
  linux-image-2.6.35-30-virtual   2.6.35-30.59

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-1201-1

CVE-2011-1020, CVE-2011-1493, CVE-2011-1770, CVE-2011-2484,

CVE-2011-2492

Severity
critical
Lowest
Low
Medium
High
Critical

September 13, 2011

Topics%20covered

Topics Covered

security advisory denial of service critical remote attack Ubuntu kernel permission issue

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.35-30.59

Get the latest News and Insights

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