Advisory Details

December 17th, 2019

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

ZDI-19-1022
ZDI-CAN-8608

CVE ID
CVSS SCORE 5.0, AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
AFFECTED VENDORS Apple
AFFECTED PRODUCTS Safari
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected 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 commitPropertyChange method. 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 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://trac.webkit.org/changeset/245469
DISCLOSURE TIMELINE
  • 2019-05-08 - Vulnerability reported to vendor
  • 2019-12-17 - Coordinated public release of advisory
CREDIT G. Geshev
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