CVE-2020-15106: Improper Input Validation in etcd
Vulnerability summary
CVE-2020-15106 is a medium (CVSS 6.5) Improper Input Validation vulnerability in etcd-io etcd. EPSS estimates a 1.26% chance of exploitation in the next 30 days, higher than 69.5% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 26 · Related 10Timeline
- 05-08-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In etcd before versions 3.3.23 and 3.4.10, it is possible to have an entry index greater then the number of entries in the ReadAll method in wal/wal.go. This could cause issues when WAL entries are being read during consensus as an arbitrary etcd consensus participant could go down from a runtime panic when reading the entry.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · GoEcosystem advisory · calculated3.7LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.26%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
Decrease -0.03 pp
From 1.29% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-129Improper Validation of Array IndexThe product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.
Affected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- etcd< 3.3.25+dfsg-5
Etcd1 product
- etcd< 3.3.23 | ≥ 3.4.0, < 3.4.10
Etcd-io1 product
- etcd< 3.3.23 | < 3.4.10
Fedoraproject1 product
- fedoraEOL32
Go.etcd.io1 product
- etcd< 0.5.0-alpha.5.0.20200423152442-f4b650b51dc4
Go.etcd.io/etcd1 product
- v3< 3.3.23 | ≥ 3.4.0, < 3.4.10
Ubuntu1 product
- etcdAll versions (No fix recorded) | < 3.2.17+dfsg-1ubuntu0.1~esm1 | < 3.2.26+dfsg-6ubuntu0.1
7 vendors · 7 products
References
21 links- github.com/etcd-io/etcd/security/advisories/GHSA-p4g4-wgrh-qrg2X Refsource CONFIRMREPORTWEBThird Party Advisory
Show all 21 references
- github.com/etcd-io/etcdPACKAGE