Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 68.5%; technical severity is CVSS 5.5.
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. A malicious application may bypass Gatekeeper checks. Apple is aware of a report that this issue may have been actively exploited..
Who should care
- Teams operating Mac Os X, macOS
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Mac Os X, macOS is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Apple Security release notes HT212325
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
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Technical details
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- CWE
- CWE-862
- Affected versions
- Apple Mac Os X (Start Including 10.15, End Including 10.15.5 | Version 10.15.6 | Version 10.15.6 | Version 10.15.7); Apple macOS (Start Including 11.0, End Excluding 11.3)
- Fixed versions
- Apple macOS (Fixed from 11.3)
- Published
- 8 September 2021
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 68.5%
- Signal calculated at 77