Advisory Details

March 30th, 2017

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

CVE ID	CVE-2017-5428
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 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.
ADDITIONAL DETAILS	Mozilla has issued an update to correct this vulnerability. More details can be found at: https://www.mozilla.org/en-US/security/advisories/mfsa2017-08/
DISCLOSURE TIMELINE	2017-03-18 - Vulnerability reported to vendor 2017-03-30 - Coordinated public release of advisory
CREDIT	Chaitin Security Research Lab

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