Advisory Details

May 30th, 2019

Apple Safari HTMLFormElement Improper Validation of Array Index Remote Code Execution Vulnerability

ZDI-19-536
ZDI-CAN-8106

CVE ID CVE-2019-8587
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 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 HTMLFormElement objects. The issue results from the lack of proper validation of user-supplied data, which can result in memory access past the end of an allocated buffer. 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://support.apple.com/en-us/HT210119
DISCLOSURE TIMELINE
  • 2019-03-04 - Vulnerability reported to vendor
  • 2019-05-30 - Coordinated public release of advisory
CREDIT G. Geshev
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