Vulnerability CVE-2017-3204


Published: 2017-04-04

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.

Type:

CWE-noinfo

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Golang -> Crypto 

 References:
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

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