Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

Vulnerabilities

Google Patches Yet Another Serious V8 Vulnerability in Chrome

An update released this week by Google for Chrome 90 patches yet another serious vulnerability affecting the V8 JavaScript engine used by the web browser.

The flaw, tracked as CVE-2021-21227 and rated high severity, was reported to Google by researcher Gengming Liu from Chinese cybersecurity firm Singular Security Lab.

An update released this week by Google for Chrome 90 patches yet another serious vulnerability affecting the V8 JavaScript engine used by the web browser.

The flaw, tracked as CVE-2021-21227 and rated high severity, was reported to Google by researcher Gengming Liu from Chinese cybersecurity firm Singular Security Lab.

The researcher earned $15,000 for reporting the vulnerability, which Google described as “insufficient data validation in V8.”

Liu told SecurityWeek that the flaw can be exploited for remote code execution in the targeted user’s browser, but noted that, similar to other recently disclosed V8 vulnerabilities, it does not escape the Chrome sandbox — a sandbox escape bug is needed to exploit CVE-2021-21227 in real world attacks.

The hacker says CVE-2021-21227 is related to CVE-2020-16040 and CVE-2020-15965, similar high-severity V8 vulnerabilities that Google patched in Chrome in December and September 2020, respectively.

CVE-2020-16040 and CVE-2020-15965 were reported to Google by Lucas Pinheiro of Microsoft Browser Vulnerability Research. Liu discovered CVE-2021-21227 while analyzing the patches for the two vulnerabilities found by Pinheiro — he says they all impact the same function.

Google has patched several serious V8 vulnerabilities in recent weeks, including some for which PoC exploits were released before patches were made available. For some of these security holes, Google warned that exploits exist in the wild.

The Chrome 90 update released this week (version 90.0.4430.93) includes 9 security fixes, including for a couple of other high-severity issues, three medium-severity bugs, and one low-severity vulnerability. Bug bounty amounts are not listed, except for a medium-severity insufficient policy enforcement issue reported by researcher Rob Wu, who earned $5,000 for his findings.

Advertisement. Scroll to continue reading.

Related: Exploit for Second Unpatched Chromium Flaw Made Public Just After First Is Patched

Related: Chrome 89 Patches Actively Exploited Vulnerability

Written By

Eduard Kovacs (@EduardKovacs) is a managing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

Click to comment

Trending

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Gain valuable insights from industry professionals who will help guide you through the intricacies of industrial cybersecurity.

Register

Join us for an in depth exploration of the critical nature of software and vendor supply chain security issues with a focus on understanding how attacks against identity infrastructure come with major cascading effects.

Register

Expert Insights

Related Content

Vulnerabilities

Less than a week after announcing that it would suspended service indefinitely due to a conflict with an (at the time) unnamed security researcher...

Data Breaches

OpenAI has confirmed a ChatGPT data breach on the same day a security firm reported seeing the use of a component affected by an...

IoT Security

A group of seven security researchers have discovered numerous vulnerabilities in vehicles from 16 car makers, including bugs that allowed them to control car...

Vulnerabilities

A researcher at IOActive discovered that home security systems from SimpliSafe are plagued by a vulnerability that allows tech savvy burglars to remotely disable...

Risk Management

The supply chain threat is directly linked to attack surface management, but the supply chain must be known and understood before it can be...

Cybercrime

Patch Tuesday: Microsoft calls attention to a series of zero-day remote code execution attacks hitting its Office productivity suite.

Vulnerabilities

Patch Tuesday: Microsoft warns vulnerability (CVE-2023-23397) could lead to exploitation before an email is viewed in the Preview Pane.

Vulnerabilities

The latest Chrome update brings patches for eight vulnerabilities, including seven reported by external researchers.