Advisory Details

August 31st, 2015

Mozilla Firefox nsIPresShell Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2015-4497
CVSS SCORE	7.5, AV:N/AC:L/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 usage of nsIPresShell. 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: https://www.mozilla.org/en-US/security/advisories/mfsa2015-94/
DISCLOSURE TIMELINE	2015-06-16 - Vulnerability reported to vendor 2015-08-31 - Coordinated public release of advisory
CREDIT	Ucha Gobejishvili

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