CVE-2021-1844
HIGHCVSS 8.8/10EPSS 2.37%
Last modified
CVE-2021-1844 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and iPadOS 14.4.1, Safari 14.0.3 (v. EPSS estimates a 2.37% chance of exploitation in the next 30 days.
Description
A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and iPadOS 14.4.1, Safari 14.0.3 (v. 14610.4.3.1.7 and 15610.4.3.1.7), watchOS 7.3.2, macOS Big Sur 11.2.3. Processing maliciously crafted web content may lead to arbitrary code execution.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Safari | < 14.0.3 |
| Apple | Ipados | < 14.4.1 |
| Apple | Iphone Os | < 14.4.1 |
| Apple | Macos | < 11.2.3 |
| Apple | Tvos | < 14.5 |
| Apple | Watchos | < 7.3.2 |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 33 |
References
- http://seclists.org/fulldisclosure/2021/Apr/55Mailing List, Third Party Advisory
- https://support.apple.com/en-us/HT212220Vendor Advisory
- https://support.apple.com/en-us/HT212221Vendor Advisory
- https://support.apple.com/en-us/HT212222Vendor Advisory
- https://support.apple.com/en-us/HT212223Vendor Advisory
- https://support.apple.com/kb/HT212323Vendor Advisory
- https://www.debian.org/security/2021/dsa-4923Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Apr/55Mailing List, Third Party Advisory
- https://support.apple.com/en-us/HT212220Vendor Advisory
- https://support.apple.com/en-us/HT212221Vendor Advisory
- https://support.apple.com/en-us/HT212222Vendor Advisory
- https://support.apple.com/en-us/HT212223Vendor Advisory
- https://support.apple.com/kb/HT212323Vendor Advisory
- https://www.debian.org/security/2021/dsa-4923Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-1844?
A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and iPadOS 14.4.1, Safari 14.0.3 (v. 14610.4.3.1.7 and 15610.4.3.1.7), watchOS 7.3.2, macOS Big Sur 11.2.3. Processing maliciously crafted web content may lead to arbitrary code execution.
How severe is CVE-2021-1844?
CVE-2021-1844 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.37% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1844?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-1844?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST