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


0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.24% (62nd percentile)
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NVD
8.1 high
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Red Hat
4.8 medium

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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.