CVE-2020-12821
CRITICALCVSS 9.8/10EPSS 1.94%
Last modified
CVE-2020-12821 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.. EPSS estimates a 1.94% chance of exploitation in the next 30 days.
Description
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Protocol | Gossipsub | 1.0 |
References
- https://bitcoin.stackexchange.com/questions/61151/eclipse-attack-vs-sybil-attackThird Party Advisory
- https://github.com/ipfs/blog/pull/450Patch, Third Party Advisory
- https://github.com/libp2p/specs/blob/master/pubsub/gossipsub/gossipsub-v1.1.mdThird Party Advisory
- https://github.com/libp2p/specs/tree/master/pubsub/gossipsubThird Party Advisory
- https://bitcoin.stackexchange.com/questions/61151/eclipse-attack-vs-sybil-attackThird Party Advisory
- https://github.com/ipfs/blog/pull/450Patch, Third Party Advisory
- https://github.com/libp2p/specs/blob/master/pubsub/gossipsub/gossipsub-v1.1.mdThird Party Advisory
- https://github.com/libp2p/specs/tree/master/pubsub/gossipsubThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-12821?
Gossipsub 1.0 does not properly resist invalid message spam, such as an eclipse attack or a sybil attack.
How severe is CVE-2020-12821?
CVE-2020-12821 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.94% probability of exploitation in the next 30 days.
How do I fix CVE-2020-12821?
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-2020-12821?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST