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 16 security fixes. Below, we highlight fixes that were contributed by external researchers. Please see the Chrome Security Page for more information.
[$20000] High CVE-2021-21106: Use after free in autofill. Reported by Weipeng Jiang (@Krace) from Codesafe Team of Legendsec at Qi'anxin Group on 2020-11-13
[$20000] High CVE-2021-21107: Use after free in drag and drop. Reported by Leecraso and Guang Gong of 360 Alpha Lab on 2020-11-30
[$20000] High CVE-2021-21108: Use after free in media. Reported by Leecraso and Guang Gong of 360 Alpha Lab on 2020-12-04
[$15000] High CVE-2021-21109: Use after free in payments. Reported by Rong Jian and Guang Gong of 360 Alpha Lab on 2020-11-24
[$15000] High CVE-2021-21110: Use after free in safe browsing. Reported by Anonymous on 2020-11-24
[$7500] High CVE-2021-21111: Insufficient policy enforcement in WebUI. Reported by Alesandro Ortiz on 2020-11-15
[$7500] High CVE-2021-21112: Use after free in Blink. Reported by YoungJoo Lee(@ashuu_lee) of Raon Whitehat on 2020-11-20
[$6000] High CVE-2021-21113: Heap buffer overflow in Skia. Reported by tsubmunu on 2020-12-03
[$N/A] High CVE-2020-16043: Insufficient data validation in networking. Reported by Samy Kamkar, Ben Seri at Armis, Gregory Vishnepolsky at Armis on 2020-11-12
[$N/A] High CVE-2021-21114: Use after free in audio. Reported by Man Yue Mo of GitHub Security Lab on 2020-11-17
[$TBD] High CVE-2020-15995: Out of bounds write in V8. Reported by Bohan Liu (@P4nda20371774) of Tencent Security Xuanwu Lab on 2020-12-11
[$TBD] High CVE-2021-21115: Use after free in safe browsing. Reported by Leecraso and Guang Gong of 360 Alpha Lab on 2020-12-11
[$N/A] Medium CVE-2021-21116: Heap buffer overflow in audio. Reported by Alison Huffman, Microsoft Browser Vulnerability Research on 2020-11-19
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 channel.
As usual, our ongoing internal security work was responsible for a wide range of fixes:
Many of our security bugs are detected using AddressSanitizer, MemorySanitizer, UndefinedBehaviorSanitizer, Control Flow Integrity, libFuzzer, or AFL.