Advisory Details

October 30th, 2018

Apple Safari WebCrypto Race Condition Remote Code Execution Vulnerability

ZDI-18-1323
ZDI-CAN-6388

CVE ID CVE-2018-4373
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 WebCrypto. The issue lies in the lack of proper locking prior to executing operations in a separate thread. 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/kb/HT201222
DISCLOSURE TIMELINE
  • 2018-06-22 - Vulnerability reported to vendor
  • 2018-10-30 - Coordinated public release of advisory
  • 2018-10-30 - Advisory Updated
CREDIT ngg
alippai
DirtYiCE
KT of Tresorit
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