Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS14aGpxLXc3eG0tcDhxas4AAxeY

golang.org/x/crypto/ssh Man-in-the-Middle attack

The Go SSH library (golang.org/x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks if ClientConfig.HostKeyCallback is not set. Default behavior changed in commit e4e2799 to require explicitly registering a hostkey verification mechanism.

Permalink: https://github.com/advisories/GHSA-xhjq-w7xm-p8qj
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS14aGpxLXc3eG0tcDhxas4AAxeY
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: almost 2 years ago
Updated: 7 months ago

CVSS Score: 8.1
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-xhjq-w7xm-p8qj, CVE-2017-3204
References:

• https://nvd.nist.gov/vuln/detail/CVE-2017-3204
• https://github.com/golang/go/issues/19767
• https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991
• https://go.dev/cl/340830
• https://go.dev/issue/19767
• https://go.googlesource.com/crypto/+/e4e2799dd7aab89f583e1d898300d96367750991
• https://godoc.org/golang.org/x/crypto/ssh
• https://pkg.go.dev/vuln/GO-2020-0013
• https://web.archive.org/web/20170423080311/https://www.securityfocus.com/bid/97481
• https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-3204
• https://bridge.grumpy-troll.org/2017/04/golang-ssh-security
• https://go.dev/cl/38701
• https://github.com/advisories/GHSA-xhjq-w7xm-p8qj

Repository: https://github.com/golang/go
Blast Radius: 44.0

Affected Packages