CVE-2017-3204

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.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.19% Top 20%
Vendor Advisory godoc.org
Affected: Go SSH library
Published at:
Updated at:

References

Link Tags
https://godoc.org/golang.org/x/crypto/ssh vendor advisory
https://github.com/golang/go/issues/19767 third party advisory
https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/ third party advisory
https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991 third party advisory patch
http://www.securityfocus.com/bid/97481 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-3204?
CVE-2017-3204 has been scored as a high severity vulnerability.
How to fix CVE-2017-3204?
To fix CVE-2017-3204, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-3204 being actively exploited in the wild?
It is possible that CVE-2017-3204 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-3204?
CVE-2017-3204 affects Go SSH library.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.