Firefox nsSVGValue Out-of-Bounds Access Vulnerability
Description
This module exploits an out-of-bounds access flaw in Firefox 7 and 8 (<= 8.0.1). 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.
Author(s)
- regenrecht
- Lincoln <lincoln@corelan.be>
- corelanc0d3r <peter.ve@corelan.be>
Platform
Windows
Development
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
- Collect and share all the information you need to conduct a successful and efficient penetration test
- Simulate complex attacks against your systems and users
- Test your defenses to make sure they’re ready
- Automate Every Step of Your Penetration Test
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security