USN-535-1: Firefox vulnerabilities

Ubuntu Security Notice USN-535-1

22nd October, 2007

firefox vulnerabilities

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

  • Ubuntu 7.10
  • Ubuntu 7.04
  • Ubuntu 6.10
  • Ubuntu 6.06 LTS

Software description

  • firefox

Details

Various flaws were discovered in the layout and JavaScript engines.
By tricking a user into opening a malicious web page, an attacker could
execute arbitrary code with the user's privileges. (CVE-2007-5336,
CVE-2007-5339, CVE-2007-5340)

Michal Zalewski discovered that the onUnload event handlers were
incorrectly able to access information outside the old page content.
A malicious web site could exploit this to modify the contents, or steal
confidential data (such as passwords), of the next loaded web page.
(CVE-2007-1095)

Stefano Di Paola discovered that Firefox did not correctly request
Digest Authentications. A malicious web site could exploit this to
inject arbitrary HTTP headers or perform session splitting attacks
against proxies. (CVE-2007-2292)

Flaws were discovered in the file upload form control. By tricking
a user into opening a malicious web page, an attacker could force
arbitrary files from the user's computer to be uploaded without their
consent. (CVE-2006-2894, CVE-2007-3511)

Eli Friedman discovered that XUL could be used to hide a window's
titlebar. A malicious web site could exploit this to enhance their
attempts at creating phishing web sites. (CVE-2007-5334)

Georgi Guninski discovered that Firefox would allow file-system based
web pages to access additional files. By tricking a user into opening
a malicious web page from a gnome-vfs location, an attacker could steal
arbitrary files from the user's computer. (CVE-2007-5337)

It was discovered that the XPCNativeWrappers were not safe in
certain situations. By tricking a user into opening a malicious
web page, an attacker could run arbitrary JavaScript with the user's
privileges. (CVE-2007-5338)

Update instructions

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

Ubuntu 7.10:
firefox 2.0.0.8+2nobinonly-0ubuntu1
Ubuntu 7.04:
firefox 2.0.0.8+1nobinonly-0ubuntu1
Ubuntu 6.10:
firefox 2.0.0.8+0dfsg-0ubuntu0.6.10
Ubuntu 6.06 LTS:
firefox 1.5.dfsg+1.5.0.14~prepatch071011b-0ubuntu1

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

After a standard system upgrade you need to restart Firefox to effect
the necessary changes.

References

CVE-2006-2894, CVE-2007-1095, CVE-2007-2292, CVE-2007-3511, CVE-2007-5334, CVE-2007-5335, CVE-2007-5336, CVE-2007-5337, CVE-2007-5338, CVE-2007-5339, CVE-2007-5340