USN-1049-2: Firefox and Xulrunner regression

7 March 2011

firefox, firefox-{3.0,3.5}, xulrunner-1.9.2 regression

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 9.10
  • Ubuntu 8.04 LTS

Summary

Fixed Java applet regression introduced in the update for USN 1049-1

Software Description

  • firefox - safe and easy web browser from Mozilla
  • xulrunner-1.9.2 - XUL + XPCOM application runner
  • firefox-3.5 - dummy upgrade package for firefox-3.5 -> firefox
  • firefox-3.0 - dummy upgrade package for firefox-3.0 -> firefox

Details

USN-1049-1 fixed vulnerabilities in Firefox and Xulrunner. That update introduced a regression where some Java applets would fail to load. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jesse Ruderman, Igor Bukanov, Olli Pettay, Gary Kwong, Jeff Walden, Henry Sivonen, Martijn Wargers, David Baron and Marcia Knous discovered several memory issues in the browser engine. An attacker could exploit these to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0053, CVE-2011-0062)

Zach Hoffman discovered that a recursive call to eval() wrapped in a try/catch statement places the browser into a inconsistent state. An attacker could exploit this to force a user to accept any dialog. (CVE-2011-0051)

It was discovered that memory was used after being freed in a method used by JSON.stringify. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0055)

Christian Holler discovered multiple buffer overflows in the JavaScript engine. An attacker could exploit these to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0054, CVE-2011-0056)

Daniel Kozlowski discovered that a JavaScript Worker kept a reference to memory after it was freed. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0057)

Alex Miller discovered a buffer overflow in the browser rendering engine. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0058)

Roberto Suggi Liverani discovered a possible issue with unsafe JavaScript execution in chrome documents. A malicious extension could exploit this to execute arbitrary code with chrome privlieges. (CVE-2010-1585)

Jordi Chancel discovered a buffer overlow in the JPEG decoding engine. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. (CVE-2011-0061)

Peleus Uhley discovered a CSRF vulnerability in the plugin code related to 307 redirects. This could allow custom headers to be forwarded across origins. (CVE-2011-0059)

Update instructions

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

Ubuntu 10.10
firefox - 3.6.15+build1+nobinonly-0ubuntu0.10.10.1
xulrunner-1.9.2 - 1.9.2.15+build1+nobinonly-0ubuntu0.10.10.1
Ubuntu 10.04 LTS
firefox - 3.6.15+build1+nobinonly-0ubuntu0.10.04.1
xulrunner-1.9.2 - 1.9.2.15+build1+nobinonly-0ubuntu0.10.04.1
Ubuntu 9.10
firefox - 3.6.15+build1+nobinonly-0ubuntu0.9.10.1
xulrunner-1.9.2 - 1.9.2.15+build1+nobinonly-0ubuntu0.9.10.1
Ubuntu 8.04 LTS
firefox - 3.6.15+build1+nobinonly-0ubuntu0.8.04.1
xulrunner-1.9.2 - 1.9.2.15+build1+nobinonly-0ubuntu0.8.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to restart Firefox and any applications which use Xulrunner to make all the necessary changes.

References