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AusCERT Update AU-2006.0035 - [Win][UNIX/Linux][OSX]
Unconfirmed vulnerabilities in Mozilla JavaScript engine may allow remote
execution of arbitrary code
3 October 2006

        AusCERT Update Summary
        ----------------------

Product:              Mozilla JavaScript Engine
                      Mozilla Firefox
                      Mozilla Thunderbird
                      Mozilla SeaMonkey
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated

There have been reports [1][2][3][4] of the possibility of multiple
vulnerabilities in Mozilla's JavaScript engine used in products such as
Firefox.

At this time AusCERT has not confirmed these vulnerabilities, and exact
impacts are unknown. However it is believed that they may allow a remote
attacker to execute arbitrary code on a victim's machine if they are able
to entice the victim to a specially crafted website.

Disabling JavaScript within Firefox and other Mozilla products may mitigate
against these vulnerabilities. Users of Firefox are recommended to disable
JavaScript, or to use the NoScript Firefox extension [5] and only enable
JavaScript on trusted sites.

AusCERT will continue to monitor the situation and release additional updates
when more information becomes available.

REFERENCES

        [1] ZDNet
            http://news.zdnet.com/2100-1009_22-6121608.html

        [2] SecuriTeam Blog
            http://blogs.securiteam.com/index.php/archives/657

        [3] News.com
            http://news.com.com/2100-1002_3-6121608.html

        [4] US-CERT Current Activity
            http://www.us-cert.gov/current/current_activity.html#ff0day

        [5] NoScript Firefox extension
            http://www.noscript.net

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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