module

Firefox nsSVGValue Out-of-Bounds Access Vulnerability

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Disclosed
2011-12-06
Created
2018-05-30

Description

This module exploits an out-of-bounds access flaw in Firefox 7 and 8 (
The notification of nsSVGValue observers via nsSVGValue::NotifyObservers(x,y)
uses a loop which can result in an out-of-bounds access to attacker-controlled memory.
The mObserver ElementAt() function (which picks up pointers), does not validate
if a given index is out of bound. If a custom observer of nsSVGValue is created,
which removes elements from the original observer,
and memory layout is manipulated properly, the ElementAt() function might pick up
an attacker provided pointer, which can be leveraged to gain remote arbitrary
code execution.

Authors

regenrecht
Lincoln lincoln@corelan.be
corelanc0d3r peter.ve@corelan.be

Platform

Windows

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use exploit/windows/browser/mozilla_nssvgvalue
    msf exploit(mozilla_nssvgvalue) > show targets
        ...targets...
    msf exploit(mozilla_nssvgvalue) > set TARGET < target-id >
    msf exploit(mozilla_nssvgvalue) > show options
        ...show and set options...
    msf exploit(mozilla_nssvgvalue) > exploit
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