TippingPoint Zero Day Initiative
 

(Pwn2Own) Mozilla Firefox createImageBitmap Integer Overflow Remote Code Execution Vulnerability

ZDI-17-234: March 30th, 2017

CVE ID

CVSS Score

Affected Vendors

Affected Products

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 createImageBitmap. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current user.

Vendor Response

Mozilla has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2017-03-18 - Vulnerability reported to vendor
    2017-03-30 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Chaitin Security Research Lab