Home/CVE/In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV r
CVE

CVE-2020-15136

In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV r

In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV records. When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints function. No authentication is performed against endpoints provided in the --endpoints flag.

This has been fixed in versions 3.4.10 and 3.3.23 with improved documentation and deprecation of the functionality.

MEDIUM · CVSS 6.5 EPSS 0.00308
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-287Improper Authentication
CWE-306Missing Authentication for Critical Function
▤

Affected Products & Versions

3
redhat etcd>= 3.3.0 and < 3.3.23
redhat etcd>= 3.4.0 and < 3.4.10
fedoraproject fedoraall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go go.etcd.io/etcd MODERATE fixed in 3.4.10
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Aug 2020 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
⚑

Vendor Advisories

3
msrcCVE-2020-15136
rhsaRHSA-2021:2438Moderate
rhsaRHSA-2021:0916Moderate
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/gateway.mdBroken Link
https://github.com/etcd-io/etcd/security/advisories/GHSA-wr2v-9rpq-c35qThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/
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