(Vendor Describes Workaround) Firefox onload() History Access Bug and Install Function Scripting Execution Flaw Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1013925 |
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SecurityTracker URL: http://securitytracker.com/id/1013925
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CVE Reference:
GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: May 9 2005
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Impact:
Execution of arbitrary code via network, User access via network
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Vendor Confirmed: Yes
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Version(s): 1.0.3
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Description:
Several vulnerabilities were reported in Firefox. A remote user can execute arbitrary code on the target user's system.
A remote user can create specially crafted HTML that, when loaded by the target user, will execute arbitrary code on the target user's system.
A remote user can cause a Firefox chrome page to load a 'javascript:' URL with privileges. The addon install function can be made to display an icon containing a 'javascript:' URL to achieve this.
Because the vulnerable install function can only be loaded via 'update.mozilla.org' or 'addon.mozilla.org', the remote user must exploit a separate vulnerability to trigger the flaw. The onload() event can be exploited via a frame within a javascript page to access ostensibly restricted elements of the window object, such as the history. The history object can be accessed to navigate back to the calling javascript page and execute the page within the context of a window (displaying 'mozilla.org' web page content).
A demonstration exploit is available at:
http://greyhatsecurity.org/vulntests/ffrc.htm
Paul from Greyhats Security reported this vulnerability. Michael Krax assisted in researching this vulnerability.
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Impact:
A remote user can execute arbitrary code on the target user's system.
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Solution:
As a workaround, the vendor indicates that you can disable Javascript. The vendor is working on a solution.
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Vendor URL: www.mozilla.org/security/announce/mfsa2005-42.html (Links to External Site)
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Cause:
Access control error
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Underlying OS:
Linux (Any), UNIX (Any), Windows (Any)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Mon, 9 May 2005 12:59:32 -0400
Subject: http://www.mozilla.org/projects/security/known-vulnerabilities.html
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> Mozilla Foundation Security Advisory 2005-42
> Title: Code execution via javascript: IconURL
> Severity: Critical
> Reporter: Paul (Greyhats)
> Products: Firefox, Mozilla Suite
> Two vulnerabilities were found in Mozilla Firefox that combined allow an attacker to
> run arbitrary code. The Mozilla Suite is only partially vulnerable.
> Workaround
> Disable Javascript. Software updates can be disabled, but that protects only against
> the second issue and not the first.
> References
> https://bugzilla.mozilla.org/show_bug.cgi?id=293302
> (originally https://bugzilla.mozilla.org/show_bug.cgi?id=292691)
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