CVE-2021-30755
MEDIUMCVSS 6.5/10EPSS 1.29%
Last modified
CVE-2021-30755 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5. EPSS estimates a 1.29% chance of exploitation in the next 30 days.
Description
Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5. An out-of-bounds read was addressed with improved input validation.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Macos | >= 11.0, < 11.4 |
| Apple | Tvos | < 14.6 |
| Apple | Watchos | < 7.5 |
References
- https://support.apple.com/en-us/HT212529Vendor Advisory
- https://support.apple.com/en-us/HT212532Vendor Advisory
- https://support.apple.com/en-us/HT212533Vendor Advisory
- https://support.apple.com/en-us/HT212529Vendor Advisory
- https://support.apple.com/en-us/HT212532Vendor Advisory
- https://support.apple.com/en-us/HT212533Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-30755?
Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5. An out-of-bounds read was addressed with improved input validation.
How severe is CVE-2021-30755?
CVE-2021-30755 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.29% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30755?
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.
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.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-30748A memory corruption issue was addressed with improved state …7.8
- CVE-2021-30749Multiple memory corruption issues were addressed with improv…8.8
- CVE-2021-30750The issue was addressed with improved permissions logic. Thi…5.5
- CVE-2021-30751This issue was addressed with improved data protection. This…5.5
- CVE-2021-30752Processing a maliciously crafted image may lead to arbitrary…7.8
- CVE-2021-30753Processing a maliciously crafted font may result in the disc…5.5
- CVE-2021-30756A local attacker may be able to view Now Playing information…5.5
- CVE-2021-30757This issue was addressed by enabling hardened runtime. This …5.5
- CVE-2021-30758A type confusion issue was addressed with improved state han…8.8
- CVE-2021-30759A stack overflow was addressed with improved input validatio…7.8
- CVE-2021-30760An integer overflow was addressed through improved input val…7.8
- CVE-2021-30761A memory corruption issue was addressed with improved state …8.8
Are you affected by CVE-2021-30755?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST