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 15.10 USN-2833-1 Critical: Firefox Code Execution Risk

ubuntu
Calendar Grey December 15, 2015
Scroller Ubuntu
Identify significant vulnerabilities in Firefox that impact various versions of Ubuntu, potentially enabling system crashes and unauthorized code execution.
Firefox could be made to crash or run programs as your login if it opened a malicious website.

Summary

Firefox could be made to crash or run programs as your login if it

opened a malicious website.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

Andrei Vaida, Jesse Ruderman, Bob Clary, Christian Holler, Jesse Ruderman,

Eric Rahm, Robert Kaiser, Harald Kirschner, and Michael Henretty

discovered multiple memory safety issues in Firefox. If a user were

tricked in to opening a specially crafted website, an attacker could

potentially exploit these to cause a denial of service via application

crash, or execute arbitrary code with the privileges of the user invoking

Firefox. (CVE-2015-7201, CVE-2015-7202)

Ronald Crane discovered three buffer overflows through code inspection.

If a user were tricked in to opening a specially crafted website, an

attacker could potentially exploit these to cause a denial of service via

application crash, or execute arbitrary code with the privileges of the

user invoking Firefox. (CVE-2015-7203, CVE-2015-7220,...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical code execution Ubuntu application crash Firefox attack vector

Update Instructions

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

Ubuntu 15.10:
  firefox                         43.0+build1-0ubuntu0.15.10.1

Ubuntu 15.04:
  firefox                         43.0+build1-0ubuntu0.15.04.1

Ubuntu 14.04 LTS:
  firefox                         43.0+build1-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  firefox                         43.0+build1-0ubuntu0.12.04.1

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

References

https://ubuntu.com/security/notices/USN-2833-1

CVE-2015-7201, CVE-2015-7202, CVE-2015-7203, CVE-2015-7204,

CVE-2015-7205, CVE-2015-7207, CVE-2015-7208, CVE-2015-7210,

CVE-2015-7211, CVE-2015-7212, CVE-2015-7213, CVE-2015-7214,

CVE-2015-7215, CVE-2015-7216, CVE-2015-7217, CVE-2015-7218,

CVE-2015-7219, CVE-2015-7220, CVE-2015-7221, CVE-2015-7222,

CVE-2015-7223

Severity
critical
Lowest
Low
Medium
High
Critical

December 15, 2015

Topics%20covered

Topics Covered

security advisory critical code execution Ubuntu application crash Firefox attack vector

Package Information

https://launchpad.net/ubuntu/+source/firefox/43.0+build1-0ubuntu0.15.10.1
https://launchpad.net/ubuntu/+source/firefox/43.0+build1-0ubuntu0.15.04.1
https://launchpad.net/ubuntu/+source/firefox/43.0+build1-0ubuntu0.14.04.1
https://launchpad.net/ubuntu/+source/firefox/43.0+build1-0ubuntu0.12.04.1

Get the latest News and Insights

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