CVE-2021-43612
HIGHCVSS 7.5/10EPSS 1.14%
Last modified
CVE-2021-43612 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.. EPSS estimates a 1.14% chance of exploitation in the next 30 days.
Description
In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lldpd Project | Lldpd | < 1.0.13 |
| Fedoraproject | Fedora | 36 |
| Fedoraproject | Fedora | 37 |
| Fedoraproject | Fedora | 38 |
References
- https://github.com/lldpd/lldpd/compare/1.0.12...1.0.13Patch, Release Notes
- https://lldpd.github.io/security.htmlPatch, Third Party Advisory
- https://github.com/lldpd/lldpd/compare/1.0.12...1.0.13Patch, Release Notes
- https://lldpd.github.io/security.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43612?
In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.
How severe is CVE-2021-43612?
CVE-2021-43612 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.14% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43612?
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.
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Are you affected by CVE-2021-43612?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST