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Alert (SA07-151A)

Mozilla Updates for Multiple Vulnerabilities

Original release date: May 31, 2007 | Last revised: June 20, 2007

Systems Affected

  • Mozilla Firefox
  • Mozilla Thunderbird
  • Mozilla SeaMonkey
  • Netscape Browser

Other products based on Mozilla components may also be affected.


Mozilla Firefox, Thunderbird, and derived products contain several vulnerabilities. By taking advantage of one or more of these vulnerabilities, an attacker may be able to take control of your computer.


Upgrade to the latest versions of Firefox, Thunderbird, and SeaMonkey

Mozilla has released Firefox, Firefox, Thunderbird, Thunderbird, SeaMonkey 1.0.9, and SeaMonkey 1.1.2 to correct these problems. By default, Mozilla Firefox, Thunderbird, and SeaMonkey automatically check for updates.

Thunderbird was released on June 13, 2007.

Support for Firefox 1.5 is scheduled to end in June 2007. According to Mozilla:

Firefox 1.5.0.x will be maintained with security and stability updates until June 2007. All users are strongly encouraged to upgrade to Firefox 2.

Disable JavaScript and Java

These vulnerabilities can be mitigated by disabling JavaScript and Java. For more information about configuring Firefox, please see the Securing Your Web Browser document. Netscape users should see the Site Controls document for details.

Thunderbird disables JavaScript and Java by default.


Mozilla products, including the Firefox web browser and Thunderbird email application, contain a number of vulnerabilities. These vulnerabilities may allow an attacker to access your computer, run programs that could cause your computer to crash, or gain control of your computer. An attacker could exploit these vulnerabilities by convincing you to visit a web site or read an HTML formatted email message.

For more technical information, please see US-CERT Technical Alert TA07-151A.



Revision History

  • May 31, 2007: Initial release
    June 08 2007: Updated information regarding availability of Thunderbird
    June 20 2007: Updated alert to note that Thunderbird is now available

This product is provided subject to this Notification and this Privacy & Use policy.

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