CVE-2021-1840
HIGHCVSS 7.8/10EPSS 0.33%
Last modified
CVE-2021-1840 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. EPSS estimates a 0.33% chance of exploitation in the next 30 days.
Description
A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A local attacker may be able to elevate their privileges.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Mac Os X | 10.14 |
| Apple | Mac Os X | 10.14.0 |
| Apple | Mac Os X | 10.14.1 |
| Apple | Mac Os X | 10.14.2 |
| Apple | Mac Os X | 10.14.3 |
| Apple | Mac Os X | 10.14.4 |
| Apple | Mac Os X | 10.14.5 |
| Apple | Mac Os X | 10.14.6 |
| Apple | Mac Os X | 10.15 |
| Apple | Mac Os X | 10.15.1 |
| Apple | Mac Os X | 10.15.2 |
| Apple | Mac Os X | 10.15.3 |
| Apple | Mac Os X | 10.15.4 |
| Apple | Mac Os X | 10.15.5 |
| Apple | Mac Os X | 10.15.6 |
| Apple | Mac Os X | 10.15.7 |
| Apple | Macos | >= 11.0, < 11.3 |
References
- https://support.apple.com/en-us/HT212325Vendor Advisory
- https://support.apple.com/en-us/HT212326Vendor Advisory
- https://support.apple.com/en-us/HT212327Vendor Advisory
- https://support.apple.com/en-us/HT212325Vendor Advisory
- https://support.apple.com/en-us/HT212326Vendor Advisory
- https://support.apple.com/en-us/HT212327Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-1840?
A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A local attacker may be able to elevate their privileges.
How severe is CVE-2021-1840?
CVE-2021-1840 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1840?
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-2021-1840?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST