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