USN-853-2: Firefox and Xulrunner regression

Ubuntu Security Notice USN-853-2

11th November, 2009

firefox-3.5, xulrunner-1.9.1 regression

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

  • Ubuntu 9.10

Software description

  • firefox-3.5
  • xulrunner-1.9.1

Details

USN-853-1 fixed vulnerabilities in Firefox and Xulrunner. The upstream
changes introduced regressions that could lead to crashes when processing
certain malformed GIF images, fonts and web pages. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory details:

Alin Rad Pop discovered a heap-based buffer overflow in Firefox when it
converted strings to floating point numbers. If a user were tricked into
viewing a malicious website, a remote attacker could cause a denial of service
or possibly execute arbitrary code with the privileges of the user invoking the
program. (CVE-2009-1563)

Jeremy Brown discovered that the Firefox Download Manager was vulnerable to
symlink attacks. A local attacker could exploit this to create or overwrite
files with the privileges of the user invoking the program. (CVE-2009-3274)

Paul Stone discovered a flaw in the Firefox form history. If a user were
tricked into viewing a malicious website, a remote attacker could access this
data to steal confidential information. (CVE-2009-3370)

Orlando Berrera discovered that Firefox did not properly free memory when using
web-workers. If a user were tricked into viewing a malicious website, a remote
attacker could cause a denial of service or possibly execute arbitrary code
with the privileges of the user invoking the program. This issue only
affected Ubuntu 9.10. (CVE-2009-3371)

A flaw was discovered in the way Firefox processed Proxy Auto-configuration
(PAC) files. If a user configured the browser to use PAC files with certain
regular expressions, an attacker could cause a denial of service or possibly
execute arbitrary code with the privileges of the user invoking the program.
(CVE-2009-3372)

A heap-based buffer overflow was discovered in Mozilla's GIF image parser. If a
user were tricked into viewing a malicious website, a remote attacker could
cause a denial of service or possibly execute arbitrary code with the
privileges of the user invoking the program. (CVE-2009-3373)

A flaw was discovered in the JavaScript engine of Firefox. An attacker could
exploit this to execute scripts from page content with chrome privileges.
(CVE-2009-3374)

Gregory Fleischer discovered that the same-origin check in Firefox could be
bypassed by utilizing the document.getSelection function. An attacker could
exploit this to read data from other domains. (CVE-2009-3375)

Jesse Ruderman and Sid Stamm discovered that Firefox did not properly display
filenames containing right-to-left (RTL) override characters. If a user were
tricked into downloading a malicious file with a crafted filename, an attacker
could exploit this to trick the user into opening a different file than the
user expected. (CVE-2009-3376)

Several flaws were discovered in third party media libraries. If a user were
tricked into opening a crafted media file, a remote attacker could cause a
denial of service or possibly execute arbitrary code with the privileges of the
user invoking the program. This issue only affected Ubuntu 9.10.
(CVE-2009-3377)

Vladimir Vukicevic, Jesse Ruderman, Martijn Wargers, Daniel Banchero, David
Keeler, Boris Zbarsky, Thomas Frederiksen, Marcia Knous, Carsten Book, Kevin
Brosnan, David Anderson and Jeff Walden discovered various flaws in the browser
and JavaScript engines of Firefox. If a user were tricked into viewing a
malicious website, a remote attacker could cause a denial of service or
possibly execute arbitrary code with the privileges of the user invoking the
program. (CVE-2009-3380, CVE-2009-3381, CVE-2009-3382, CVE-2009-3383)

Update instructions

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

Ubuntu 9.10:
xulrunner-1.9.1 1.9.1.5+nobinonly-0ubuntu0.9.10.1
firefox-3.5 3.5.5+nobinonly-0ubuntu0.9.10.1

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

After a standard system upgrade you need to restart Firefox and any
applications that use xulrunner to effect the necessary changes.

References

LP: 480740