CVE-2021-30738
MEDIUMCVSS 5.5/10EPSS 0.30%
Last modified
CVE-2021-30738 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A malicious application may be able to overwrite arbitrary files. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-004 Mojave. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
Description
A malicious application may be able to overwrite arbitrary files. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-004 Mojave. An issue with path validation logic for hardlinks was addressed with improved path sanitization.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Mac Os X | >= 10.14.0, <= 10.14.5 |
| Apple | Mac Os X | 10.14.6 |
| Apple | Macos | >= 11.0.1, < 11.4 |
References
- https://support.apple.com/en-us/HT212529Vendor Advisory
- https://support.apple.com/en-us/HT212531Vendor Advisory
- https://support.apple.com/en-us/HT212529Vendor Advisory
- https://support.apple.com/en-us/HT212531Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-30738?
A malicious application may be able to overwrite arbitrary files. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-004 Mojave. An issue with path validation logic for hardlinks was addressed with improved path sanitization.
How severe is CVE-2021-30738?
CVE-2021-30738 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30738?
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-2021-30738?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST