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AUSCERT External Security Bulletin Redistribution
Chrome 84.0.4147.89 fixes multiple security vulnerabilities
16 July 2020
AusCERT Security Bulletin Summary
Product: Chrome for Desktop
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Unauthorised Access -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
CVE Names: CVE-2020-6536 CVE-2020-6535 CVE-2020-6534
CVE-2020-6533 CVE-2020-6531 CVE-2020-6530
CVE-2020-6529 CVE-2020-6528 CVE-2020-6527
CVE-2020-6526 CVE-2020-6525 CVE-2020-6524
CVE-2020-6523 CVE-2020-6522 CVE-2020-6521
CVE-2020-6520 CVE-2020-6519 CVE-2020-6518
CVE-2020-6517 CVE-2020-6516 CVE-2020-6515
CVE-2020-6514 CVE-2020-6513 CVE-2020-6512
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Stable Channel Update for Desktop
Tuesday, July 14, 2020
The Chrome team is delighted to announce the promotion of Chrome 84 to the
stable channel for Windows, Mac and Linux. This will roll out over the coming
Chrome 84.0.4147.89 contains a number of fixes and improvements -- a list of
changes is available in the log. Watch out for upcoming Chrome and Chromium
blog posts about new features and big efforts delivered in 84.
Security Fixes and Rewards
Note: Access to bug details and links may be kept restricted until a majority
of users are updated with a fix. We will also retain restrictions if the bug
exists in a third party library that other projects similarly depend on, but
haven?t yet fixed.
This update includes 38 security fixes. Below, we highlight fixes that were
contributed by external researchers. Please see the Chrome Security Page for
[$TBD] Critical CVE-2020-6510: Heap buffer overflow in background
fetch. Reported by Leecraso and Guang Gong of 360 Alpha Lab working with 360
BugCloud on 2020-07-08
[$5000] High CVE-2020-6511: Side-channel information leakage in
content security policy. Reported by Mikhail Oblozhikhin on 2020-04-24
[$5000] High CVE-2020-6512: Type Confusion in V8. Reported by nocma,
leogan, cheneyxu of WeChat Open Platform Security Team on 2020-05-20
[$2000] High CVE-2020-6513: Heap buffer overflow in PDFium. Reported
by Aleksandar Nikolic of Cisco Talos on 2020-06-04
[$TBD] High CVE-2020-6514: Inappropriate implementation in WebRTC.
Reported by Natalie Silvanovich of Google Project Zero on 2020-04-30
[$TBD] High CVE-2020-6515: Use after free in tab strip. Reported by
DDV_UA on 2020-05-14
[$TBD] High CVE-2020-6516: Policy bypass in CORS. Reported by Yongke
Wang of Tencent's Xuanwu Lab (xlab.tencent.com) on 2020-06-08
[$TBD] High CVE-2020-6517: Heap buffer overflow in history. Reported
by ZeKai Wu (@hellowuzekai) of Tencent Security Xuanwu Lab on 2020-06-16
[$3000] Medium CVE-2020-6518: Use after free in developer tools.
Reported by David Erceg on 2019-07-20
[$3000] Medium CVE-2020-6519: Policy bypass in CSP. Reported by Gal
Weizman (@WeizmanGal) of PerimeterX on 2020-03-25
[$1000] Medium CVE-2020-6520: Heap buffer overflow in Skia. Reported
by Zhen Zhou of NSFOCUS Security Team on 2020-06-08
[$500] Medium CVE-2020-6521: Side-channel information leakage in
autofill. Reported by Xu Lin (University of Illinois at Chicago), Panagiotis
Ilia (University of Illinois at Chicago), Jason Polakis (University of Illinois
at Chicago) on 2020-04-27
[$TBD] Medium CVE-2020-6522: Inappropriate implementation in external
protocol handlers. Reported by Eric Lawrence of Microsoft on 2020-02-13
[$N/A] Medium CVE-2020-6523: Out of bounds write in Skia. Reported by
Liu Wei and Wu Zekai of Tencent Security Xuanwu Lab on 2020-05-08
[$N/A] Medium CVE-2020-6524: Heap buffer overflow in WebAudio.
Reported by Sung Ta (@Mipu94) of SEFCOM Lab, Arizona State University on
[$N/A] Medium CVE-2020-6525: Heap buffer overflow in Skia. Reported by
Zhen Zhou of NSFOCUS Security Team on 2020-06-05
[$1000] Low CVE-2020-6526: Inappropriate implementation in iframe
sandbox. Reported by Jonathan Kingston on 2020-04-24
[$500] Low CVE-2020-6527: Insufficient policy enforcement in CSP.
Reported by Zhong Zhaochen of andsecurity.cn on 2019-08-10
[$500] Low CVE-2020-6528: Incorrect security UI in basic auth.
Reported by Rayyan Bijoora on 2020-03-22
[$N/A] Low CVE-2020-6529: Inappropriate implementation in WebRTC.
Reported by kaustubhvats7 on 2019-06-26
[$N/A] Low CVE-2020-6530: Out of bounds memory access in developer
tools. Reported by myvyang on 2019-10-21
[$TBD] Low CVE-2020-6531: Side-channel information leakage in scroll
to text. Reported by Jun Kokatsu, Microsoft Browser Vulnerability Research on
[$N/A] Low CVE-2020-6533: Type Confusion in V8. Reported by Avihay
Cohen @ SeraphicAlgorithms on 2020-04-11
[$N/A] Low CVE-2020-6534: Heap buffer overflow in WebRTC. Reported by
Anonymous on 2020-04-20
[$TBD] Low CVE-2020-6535: Insufficient data validation in WebUI.
Reported by Jun Kokatsu, Microsoft Browser Vulnerability Research on 2020-04-22
[$TBD] Low CVE-2020-6536: Incorrect security UI in PWAs. Reported by
Zhiyang Zeng of Tencent security platform department on 2020-05-09
We would also like to thank all security researchers that worked with us during
the development cycle to prevent security bugs from ever reaching the stable
As usual, our ongoing internal security work was responsible for a wide range
 Various fixes from internal audits, fuzzing and other initiatives
Many of our security bugs are detected using AddressSanitizer, MemorySanitizer,
UndefinedBehaviorSanitizer, Control Flow Integrity, libFuzzer, or AFL.
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