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AUSCERT External Security Bulletin Redistribution
Apple Safari HTMLSlotElement Use-After-Free Remote Code
6 September 2017
AusCERT Security Bulletin Summary
Product: Apple Safari
Publisher: Zero Day Initiative
Operating System: Mac OS
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
CVE Names: CVE-2017-7071
Comment: This advisory references vulnerabilities in products which run on
platforms other than Mac OS. It is recommended that administrators
running Apple Safari check for an updated version of the software
for their operating system.
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Apple Safari HTMLSlotElement Use-After-Free Remote Code Execution
ZDI-17-714: September 5th, 2017
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 HTMLSlotElement 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.
Apple has issued an update to correct this vulnerability. More details can be
2017-03-09 - Vulnerability reported to vendor
2017-09-05 - Coordinated public release of advisory
This vulnerability was discovered by:
Kai Kang(a.k.a 4B5F5F4B) of Tencent's Xuanwu LAB(http://www.tencent.com)
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