CVE-2017-3204

8.1 HIGH

Published: April 04, 2017 Modified: May 13, 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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

http://www.securityfocus.com/bid/97481

Source: cret@cert.org

Third Party Advisory VDB Entry

https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/

Source: cret@cert.org

Third Party Advisory

https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991

Source: cret@cert.org

Patch Third Party Advisory

https://github.com/golang/go/issues/19767

Source: cret@cert.org

Third Party Advisory

https://godoc.org/golang.org/x/crypto/ssh

Source: cret@cert.org

Vendor Advisory

http://www.securityfocus.com/bid/97481