(Pwn2Own) Mozilla Firefox TypeObject Use-After-Free Remote Code Execution Vulnerability

April 11th, 2014
ZDI-14-083 ZDI-CAN-2219

CVE ID

CVE-2014-1512

CVSS Score

6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected Vendors

Mozilla

Affected Products

Firefox

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the handling of TypeObjects. By manipulating a document's elements an attacker can force a dangling pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.

Additional Details

Mozilla has issued an update to correct this vulnerability. More details can be found at:
http://www.mozilla.org/security/announce/2014/mfsa2014-30.html

Disclosure Timeline

  • 2014-03-12 - Vulnerability reported to vendor
  • 2014-04-11 - Coordinated public release of advisory

Credit

VUPEN

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