GitHub Advisoryadvisory · Go
GHSA-xhjq-w7xm-p8qj golang.org/x/crypto/ssh Man-in-the-Middle attack
HIGH
Official page ↗
- Aliases
- CVE-2017-3204
- Ecosystem
- Go
- Packages
- golang.org/x/crypto
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Reviewed
- 2023-02-07
Affected packages
• Go golang.org/x/crypto: < 0.0.0-20170330155735-e4e2799dd7aa → fixed in 0.0.0-20170330155735-e4e2799dd7aa
Description
The Go SSH library (golang.org/x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks if ClientConfig.HostKeyCallback is not set. Default behavior changed in commit e4e2799 to require explicitly registering a hostkey verification mechanism.
Related
Alias · CVE (1)
- CVE-2017-3204 The Go SSH library (x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks. vulnerability
References
- https://nvd.nist.gov/vuln/detail/CVE-2017-3204 advisory
- https://github.com/golang/go/issues/19767 web
- https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991 web
- https://bridge.grumpy-troll.org/2017/04/golang-ssh-security web
- https://go.dev/cl/340830 web
- https://go.dev/cl/38701 web
- https://go.dev/issue/19767 web
- https://go.googlesource.com/crypto/+/e4e2799dd7aab89f583e1d898300d96367750991 web
- https://godoc.org/golang.org/x/crypto/ssh web
- https://pkg.go.dev/vuln/GO-2020-0013 web
- https://web.archive.org/web/20170423080311/https://www.securityfocus.com/bid/97481 web
- https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-3204 web