A Chrome 95 update released by Google on Thursday patches two actively exploited Chrome vulnerabilities, as well as flaws that were disclosed recently at a Chinese hacking contest.
Google employees have been credited for both zero-day vulnerabilities. No information has been made available regarding the attacks in which these vulnerabilities have been exploited.
More than a dozen Chrome vulnerabilities discovered this year have been exploited in the wild, according to data from Google’s Project Zero group.
The latest Chrome 95 update includes eight security fixes, including at least seven classified as high severity. Wei Yuan of MoyunSec VLab earned $10,000 for a use-after-free bug, and while that is the highest bounty awarded by Google, two of the CVEs patched this week earned two research teams a total of $300,000 at the Tianfu Cup hacking contest that took place recently in China.
The Kunlun Lab and 360 Alpha Lab teams each earned $150,000 for Chrome exploit chains that achieved remote code execution with a sandbox escape. The rewards were paid out by the organizers of Tianfu Cup — Google does not pay out separate rewards for vulnerabilities disclosed at hacking competitions such as Tianfu Cup and Pwn2Own.
SecurityWeek has learned that the Kunlun Lab exploit also involved a Windows kernel bug that has yet to be patched.
At the Tianfu Cup, participants earned a total of $1.9 million for demonstrating exploits targeting Windows 10, Ubuntu, iOS 15 on iPhone 13 Pro, Microsoft Exchange, Chrome, Safari, Adobe Reader, Parallels Desktop, QEMU, Docker, VMware ESXi and Workstation, and ASUS routers.
The Stable channel has been updated to 95.0.4638.69 for Windows, Mac and Linux which will roll out over the coming days/weeks.
A full list of changes in this build is available in the log. Interested in switching release channels? Find out how here. If you find a new issue, please let them know by filing a bug. The community help forum is also a great place to reach out for help or learn about common issues.
[$10000] High CVE-2021-37997 : Use after free in Sign-In. Reported by Wei Yuan of MoyunSec VLab on 2021-10-14
[$7500] High CVE-2021-37998 : Use after free in Garbage Collection. Reported by Cassidy Kim of Amber Security Lab, OPPO Mobile Telecommunications Corp. Ltd. on 2021-10-13
[$1000] High CVE-2021-37999 : Insufficient data validation in New Tab Page. Reported by Ashish Arun Dhone on 2021-09-21
[$N/A] High CVE-2021-38000 : Insufficient validation of untrusted input in Intents. Reported by Clement Lecigne, Neel Mehta, and Maddie Stone of Google Threat Analysis Group on 2021-09-15
[$N/A] High CVE-2021-38001 : Type Confusion in V8. Reported by @s0rrymybad of Kunlun Lab via Tianfu Cup on 2021-10-16
[$N/A] High CVE-2021-38002 : Use after free in Web Transport. Reported by @__R0ng of 360 Alpha Lab, 漏洞研究院青训队 via Tianfu Cup on 2021-10-16
[$TBD] High CVE-2021-38003 : Inappropriate implementation in V8. Reported by Clément Lecigne from Google TAG and Samuel Groß from Google Project Zero on 2021-10-26
Google is aware that exploits for CVE-2021-38000 and CVE-2021-38003 exist in the wild.
 Various fixes from internal audits, fuzzing and other initiatives