CISA KEV · Known exploitedCritical

CVE-2021-30633

Google Chromium Indexed DB API

Use after free in Indexed DB API in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

CVSS
9.6
EPSS
32.7%
98.2% percentile
CISA KEV
Listed
Published
2021.10.09
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability32.7%
Technical severityCVSS 9.6

Vulnerability overview

Use after free in Indexed DB API in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

Affected product and versions

Product
Google Chromium Indexed DB API
Affected versions
unspecified, < 93.0.4577.82, 33, 35
Fixed versions
93.0.4577.82

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2021.11.17
  1. 1
    Identify

    Confirm that Google Chromium Indexed DB API and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
CWE-416
KEV added
2021.11.03
Ransomware use
미확인
CVE-2021-30633 — Google Chromium Indexed DB API | SECUFOCUS NOW