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TITLE:
Firefox Command Line URL Shell Command Injection

SECUNIA ADVISORY ID:
SA16869

VERIFY ADVISORY:
http://secunia.com/advisories/16869/

CRITICAL:
Extremely critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Mozilla Firefox 1.x
http://secunia.com/product/4227/

DESCRIPTION:
Peter Zelezny has discovered a vulnerability in Firefox, which can be
exploited by malicious people to compromise a user's system.

The vulnerability is caused due to the shell script used to launch
Firefox parsing shell commands that are enclosed within backticks in
the URL provided via the command line. This can e.g. be exploited to
execute arbitrary shell commands by tricking a user into following a
malicious link in an external application which uses Firefox as the
default browser (e.g. the mail client Evolution on Red Hat Enterprise
Linux 4).

This vulnerability can only be exploited on Unix / Linux based
environments.

The vulnerability has been confirmed in version 1.0.6 on Fedora Core
4 and Red Hat Enterprise Linux 4. Other versions and platforms may
also be affected.

SOLUTION:
Do not open links in Firefox from external applications.

PROVIDED AND/OR DISCOVERED BY:
Peter Zelezny

ORIGINAL ADVISORY:
https://bugzilla.mozilla.org/show_bug.cgi?id=307185

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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