The Layout Engine in the Mozilla 1.7 application (see mozilla(1)) contains multiple memory corruption vulnerabilities which may allow a remote user who is able to create a web page which is visited by a local user using the Mozilla browser, or who sends a specially crafted email that is read by a local user using Mozilla, to either cause the Mozilla application to crash or execute arbitrary code with the privileges of the user running Mozilla. The ability of a remote user to cause the Mozilla application to crash is a type of Denial of Service (DoS).

The following Mozilla advisory describes 30 separate issues. Of these issues, 20 affect the Layout engine and are listed under CVE-2007-2867, and 10 affect the JavaScript engine and are listed under CVE-2007-2868:

• http://www.mozilla.org/security/announce/2007/mfsa2007-12.html

This Sun Alert corresponds to the 20 Layout engine issues described in the Mozilla advisory under CVE-2007-2867.

Additional references:

• CVE-2007-2867 at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2867
• CERT VU#751636 at: http://www.kb.cert.org/vuls/id/751636
• CERT Technical Cyber Security Alert TA07-151A at: http://www.us-cert.gov/cas/techalerts/TA07-151A.html

These issues can occur in the following releases:

SPARC Platform

• Mozilla 1.7 (for Solaris 8)
• Mozilla 1.7 (for Solaris 9)
• Mozilla 1.7 (for Solaris 10)

x86 Platform

• Mozilla 1.7 (for Solaris 8)
• Mozilla 1.7 (for Solaris 9)
• Mozilla 1.7 (for Solaris 10)

Note: Mozilla 1.4 may be vulnerable to one or more of these security issues. Customers are advised to upgrade to Mozilla 1.7 to get the security fixes once they are available.

To determine the version of Mozilla on a Solaris system, the following command can be run:

    % /usr/sfw/bin/mozilla -version
    Mozilla 1.7, (Sun Java Desktop System), build 2005031721

There are no predictable symptoms that would indicate the described issues have been exploited.

To work around the issues described in this Sun Alert, disable JavaScript by doing the following:

1. Open the "Preferences" dialog from the Edit menu
2. Select the "Advanced" tree
3. Select the "Scripts & Plug-ins" leaf
4. Uncheck the "Navigator" and "Mail & Newsgroups" check boxes
5. Click the "OK" button

A final resolution is pending completion.

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