USN-490-1: Firefox vulnerabilities

Ubuntu Security Notice USN-490-1

19th July, 2007

firefox vulnerabilities

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

  • Ubuntu 7.04
  • Ubuntu 6.10
  • Ubuntu 6.06 LTS

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-2007-3734,
CVE-2007-3735)

Flaws were discovered in the JavaScript methods addEventListener and
setTimeout which could be used to inject script into another site in
violation of the browser's same-origin policy. A malicious web site
could exploit this to modify the contents, or steal confidential data
(such as passwords), of other web pages. (CVE-2007-3736)

Ronen Zilberman and Michal Zalewski discovered timing attacks in the
JavaScript engine's use of about:blank frames. A malicious web site
could exploit this to modify the contents, or steal confidential data
(such as passwords), of other web pages. (CVE-2007-3089)

A flaw was discovered in the JavaScript event handling code. By tricking
a user into opening a malicious web page, an attacker could execute
arbitrary code with the user's privileges. (CVE-2007-3737)

Ronald van den Heetkamp discovered that filename URLs including an encoded
null byte could confuse the extension matching code. By tricking a user
into opening a malicious web page, an attacker could execute arbitrary
helper programs. (CVE-2007-3285)

Michal Zalewski discovered flaws in the same-origin handling of cached
"wyciwyg://" documents. A malicious web site could exploit this to
modify the contents, or steal confidential data (such as passwords),
of other web pages. (CVE-2007-3656)

Various flaws were discovered in the XPCNativeWrapper method. By tricking
a user into opening a malicious web page, an attacker could execute
arbitrary code with the user's privileges. (CVE-2007-3738).

Update instructions

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

Ubuntu 7.04:
firefox 2.0.0.5+1-0ubuntu1
Ubuntu 6.10:
firefox 2.0.0.5+0dfsg-0ubuntu0.6.10
Ubuntu 6.06 LTS:
firefox 1.5.dfsg+1.5.0.13~prepatch070716-0ubuntu1

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-2007-3089, CVE-2007-3285, CVE-2007-3656, CVE-2007-3734, CVE-2007-3735, CVE-2007-3736, CVE-2007-3737, CVE-2007-3738