CVE-2017-3204
HIGH8.1EPSS 0.45%Man-in-the-middle attack in golang.org/x/crypto/ssh
Published: 2/7/2023Modified: 4/28/2026
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.
Affected packages (3)
- Debian/golang-go.cryptofrom 0, < 1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1
- Go/golang.org/x/cryptofrom 0, < 0.0.0-20170330155735-e4e2799dd7aa
- Go/golang.org/x/cryptofrom 0, < 0.0.0-20170330155735-e4e2799dd7aa
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
References (14)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2017-3204
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2017-3204
- WEBhttps://bridge.grumpy-troll.org/2017/04/golang-ssh-security
- WEBhttps://bridge.grumpy-troll.org/2017/04/golang-ssh-security/
- WEBhttps://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991
- WEBhttps://github.com/golang/go/issues/19767
- WEBhttps://go.dev/cl/340830
- WEBhttps://go.dev/cl/38701
- WEBhttps://go.dev/issue/19767
- WEBhttps://godoc.org/golang.org/x/crypto/ssh
- WEBhttps://go.googlesource.com/crypto/+/e4e2799dd7aab89f583e1d898300d96367750991
- WEBhttps://pkg.go.dev/vuln/GO-2020-0013
- WEBhttps://web.archive.org/web/20170423080311/https://www.securityfocus.com/bid/97481
- WEBhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-3204