Man-in-the-Middle (MitM) Affecting golang.org/x/crypto/ssh package, versions


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    EPSS
    0.24% (63rd percentile)

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  • Snyk ID SNYK-GOLANG-GOLANGORGXCRYPTOSSH-50032
  • published 30 Mar 2017
  • disclosed 30 Mar 2017
  • credit Phil Pennock

How to fix?

Upgrade github.com/golang/crypto/ssh to commit e4e2799 or higher.

Overview

Affected versions of github.com/golang/crypto/ssh are vulnerable to Man-in-the-middle (MitM) attacks. 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 Scores

version 3.1
Expand this section

Snyk

Recommended
8.1 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
Expand this section

NVD

8.1 high