CVE-2021-1871
Last modified
CVE-2021-1871 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. CISA has confirmed active exploitation in the wild. EPSS estimates a 7.12% chance of exploitation in the next 30 days.
Description
A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Ipados | < 14.4 |
| Apple | Iphone Os | < 14.4 |
| Apple | Mac Os X | >= 10.15, < 10.15.7 |
| Apple | Mac Os X | 10.15.7 |
| Apple | Macos | >= 11.0.1, < 11.2 |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 33 |
References
- https://support.apple.com/en-us/HT212146Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212147Release Notes, Vendor Advisory
- https://www.debian.org/security/2021/dsa-4923Mailing List, Third Party Advisory
- https://support.apple.com/en-us/HT212146Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212147Release Notes, Vendor Advisory
- https://www.debian.org/security/2021/dsa-4923Mailing List, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1871US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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