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 1 461
Alerts This Week
Warning Icon 1 461

Ubuntu 11.04 USN-1157-1 Critical: Firefox Memory Issues Exploit

ubuntu
Calendar Grey June 22, 2011
Scroller Ubuntu
Patches for severe Firefox weaknesses in Ubuntu 11.04 implemented to safeguard against possible attacks and unauthorized code running.
Multiple Firefox vulnerabilities have been fixed

Summary

Multiple Firefox vulnerabilities have been fixed

Software Description:

- firefox: Safe and easy web browser from Mozilla

Details:

Bob Clary, Kevin Brosnan, Gary Kwong, Jesse Ruderman, Christian Biesinger,

Bas Schouten, Igor Bukanov, Bill McCloskey, Olli Pettay, Daniel Veditz and

Marcia Knous discovered multiple memory vulnerabilities in the browser

rendering engine. An attacker could possibly execute arbitrary code with

the privileges of the user invoking Firefox. (CVE-2011-2374, CVE-2011-2375)

Martin Barbella discovered that under certain conditions, viewing a XUL

document while JavaScript was disabled caused deleted memory to be

accessed. An attacker could potentially use this to crash Firefox or

execute arbitrary code with the privileges of the user invoking Firefox.

(CVE-2011-2373)

Jordi Chancel discovered a vulnerability on multipart/x-mixed-replace

images due to memory corruption. An attacker could potentially use this to

crash Firefox or execute ar...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical software update exploit firefox memory issue ubuntu

Update Instructions

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

Ubuntu 11.04:
  firefox                         5.0+build1+nobinonly-0ubuntu0.11.04.1

After a standard system update you need to restart Firefox to make
all the necessary changes.

References

CVE-2011-2366, CVE-2011-2367, CVE-2011-2368, CVE-2011-2369,

CVE-2011-2370, CVE-2011-2371, CVE-2011-2373, CVE-2011-2374,

CVE-2011-2375, CVE-2011-2377

Severity
critical
Lowest
Low
Medium
High
Critical

June 22, 2011

Topics%20covered

Topics Covered

security advisory critical software update exploit firefox memory issue ubuntu

Package Information

https://launchpad.net/ubuntu/+source/firefox/5.0+build1+nobinonly-0ubuntu0.11.04.1

Get the latest News and Insights

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