Advisory Details

May 30th, 2019

Apple Safari BreakingContext Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-19-529
ZDI-CAN-7600

CVE ID CVE-2019-8615
CVSS SCORE 4.3, AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
AFFECTED VENDORS Apple
AFFECTED PRODUCTS Safari
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Apple macOS. 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 BreakingContext object. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities 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
  • 2019-02-12 - Vulnerability reported to vendor
  • 2019-05-30 - Coordinated public release of advisory
CREDIT G. Geshev from MWR Labs
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