Insufficient validation of untrusted input in V8 in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Published 2021-04-26 17:15:09
Updated 2024-07-25 17:31:22
Source Chrome
View at NVD,   CVE.org

Products affected by CVE-2021-21220

CVE-2021-21220 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Google Chromium V8 Improper Input Validation Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Google Chromium V8 Engine contains an improper input validation vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Micro
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2021-21220
Added on 2021-11-03 Action due date 2021-11-17

Exploit prediction scoring system (EPSS) score for CVE-2021-21220

94.84%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 99 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2021-21220

  • Google Chrome versions before 89.0.4389.128 V8 XOR Typer Out-Of-Bounds Access RCE
    Disclosure Date: 2021-04-13
    First seen: 2021-05-01
    exploit/multi/browser/chrome_cve_2021_21220_v8_insufficient_validation
    This module exploits an issue in the V8 engine on x86_x64 builds of Google Chrome before 89.0.4389.128/90.0.4430.72 when handling XOR operations in JIT'd JavaScript code. Successful exploitation allows an attacker to execute arbitrary code within the context of the V8

CVSS scores for CVE-2021-21220

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.8
MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
NIST
8.8
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.8
5.9
NIST

CWE ids for CVE-2021-21220

  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-21220

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