Advisory Details

May 18th, 2017

(Pwn2Own) Apple Safari WebGLRenderingContextBase drawElements Out-Of-Bounds Read Information Disclosure Vulnerability

CVE ID	CVE-2017-2539
CVSS SCORE	4.3, AV:N/AC:M/Au:N/C:P/I:N/A:N
AFFECTED VENDORS	Apple
AFFECTED PRODUCTS	Safari
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Apple Safari. 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 WebGLRenderingContextBase objects. The issue results from the lack of proper validation of user-supplied data, which can result in a read outside of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process.
ADDITIONAL DETAILS	Apple has issued an update to correct this vulnerability. More details can be found at: https://support.apple.com/en-us/HT207804
DISCLOSURE TIMELINE	2017-03-17 - Vulnerability reported to vendor 2017-05-18 - Coordinated public release of advisory
CREDIT	Richard Zhu (fluorescence)

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