CVE-2017-3204 Information

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 Vector

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

Reference

http://www.securityfocus.com/bid/97481 https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/ https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991 https://github.com/golang/go/issues/19767 https://godoc.org/golang.org/x/crypto/ssh

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1