TippingPoint Zero Day Initiative
 

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

ZDI-17-361: May 18th, 2017

CVE ID

CVSS Score

Affected Vendors

Affected Products

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.

Vendor Response

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

Disclosure Timeline

    2017-03-17 - Vulnerability reported to vendor
    2017-05-18 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Richard Zhu (fluorescence)