Apple Safari RenderElement Use-After-Free Remote Code Execution Vulnerability

May 15th, 2017
ZDI-17-346 ZDI-CAN-4536

CVE ID

CVE-2017-2506

CVSS Score

6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected Vendors

Apple

Affected Products

Safari

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code 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 RenderElement objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code under the context of the current process.

Additional Details

Disclosure Timeline

  • 2017-03-09 - Vulnerability reported to vendor
  • 2017-05-15 - Coordinated public release of advisory

Credit

Zheng Huang of the Baidu Security Lab

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