What’s Vulnerable › Vulnerabilities

CVE-2020-15114: Denial of Service in etcd

• Severity: high (CVSS 7.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-06 · updated 2026-06-17
• Weakness: CWE-400

Description

In etcd before versions 3.3.23 and 3.4.10, the etcd gateway is a simple TCP proxy to allow for basic service discovery and access. However, it is possible to include the gateway address as an endpoint. This results in a denial of service, since the endpoint can become stuck in a loop of requesting itself until there are no more available file descriptors to accept connections on the gateway.

Affected products

• Fedoraproject Fedora: 32
• RedHat Etcd: from 3.3.0 before 3.3.23; from 3.4.0 before 3.4.10 — fixed in 3.3.23, 3.4.10

How to fix

Upgrade to a fixed version: RedHat Etcd 3.3.23, 3.4.10. Check the vendor advisory for mitigations.

References

• https://github.com/etcd-io/etcd/security/advisories/GHSA-2xhq-gv6c-p224
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/
• https://github.com/etcd-io/etcd/security/advisories/GHSA-2xhq-gv6c-p224
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/

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