Bug 230733 - CVE-2007-0994 Thunderbird arbitrary javascript command execution
CVE-2007-0994 Thunderbird arbitrary javascript command execution
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: thunderbird (Show other bugs)
All Linux
medium Severity urgent
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Assigned To: Gecko Maintainer
: Security
Depends On:
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Reported: 2007-03-02 10:45 EST by Josh Bressers
Modified: 2007-11-30 17:07 EST (History)
2 users (show)

See Also:
Fixed In Version: RHSA-2007-0078
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2007-03-02 13:28:46 EST
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Description Josh Bressers 2007-03-02 10:45:50 EST
A bug was found in the way Thunderbird handles <img> tags.  To quote the
upstream bug:

When javascript: url is set by script, the access checks work properly.

  <img id="i">
  i.src = "javascript:...";

But, when javascript: url is set by <img> (or <link>, <style>) tag, the access
checks don't work properly.

  <img src="javascript:...">

Thus, sandboxed script can access xbl.method's clone parent and xbl compilation
scope to run arbitrary code with chrome privileges.
Comment 1 Josh Bressers 2007-03-02 13:08:13 EST
Lifting embargo
Comment 2 Red Hat Bugzilla 2007-03-02 13:28:46 EST
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

Comment 3 Josh Bressers 2007-03-06 14:48:14 EST
This flaw does not affect Thunderbird as previously thought.  This is noted in
the upstream advisory:

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