Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a craft
Affects Google Chrome versions before 90.0.4430.85, through the V8 JavaScript library that Chrome uses. The fix is in Chrome 90.0.4430.85; the vendor-side severity rating is not given in the checked facts.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 90.0.4430.85
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Google Chrome's V8 JavaScript engine is affected by this vulnerability. A remote attacker could exploit it by tricking a user into opening a specially crafted web page, allowing code to run inside Chrome's sandbox.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Google Chrome
From unspecified · fixed in 90.0.4430.85
References 7
chromereleases.googleblog.com
crbug.com
debian.org
security.gentoo.org
lists.fedoraproject.org
Questions about CVE-2021-21224
What does this mean?
V8, Chrome's JavaScript engine, mishandles a value of one type as if it were another (a type confusion). Per the advisory, a remote attacker could use a crafted page to run arbitrary code inside the browser's sandbox.Source: lists.debian.org
Am I affected, and how do I check?
Chrome builds before 90.0.4430.85 are in scope, and the earliest affected version is not specified. To check a Chrome install, open the chrome://version page or the About Chrome menu and compare the version number with 90.0.4430.85.Source: lists.debian.org
What should I do about it?
Update Chrome to 90.0.4430.85 or later. On Debian 10, the fixed package is 90.0.4430.85-1~deb10u1.Source: lists.debian.org
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2021-11-03, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data