CVE-2017-3204: go ssh library Cryptographic Issues
Vulnerability summary
CVE-2017-3204 is a high (CVSS 8.1) Cryptographic Issues vulnerability in go ssh library. EPSS estimates a 3.16% chance of exploitation in the next 30 days, higher than 87.9% of scored vulnerabilities.
Severe, CVSS 8.1 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Timeline
- 04-04-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The Go SSH library (x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks. Default behavior changed in commit e4e2799 to require explicitly registering a hostkey verification mechanism.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · GoEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.16%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.16% 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 causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu2 products
- golang-go.cryptoAll versions (No fix recorded)
- snapdAll versions (No fix recorded)
Debian1 product
- golang-go.crypto< 1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1
Go1 product
- ssh libraryprior to commit e4e2799
Golang1 product
- crypto≤ 2017-03-17
Golang.org/x1 product
- crypto< 0.0.0-20170330155735-e4e2799dd7aa
5 vendors · 6 products
References
17 links- github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991X Refsource CONFIRMPatchThird Party AdvisoryWEB
