Vulnerability in Go SSH Library
CVE-2017-3204
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.
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.032 (87.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- Go SSH Library — versions prior to commit e4e2799
- Golang Crypto
Weakness classification (CWE)
Public proof-of-concept exploits
References
- godoc.org/golang.org/x/crypto/ssh (Vendor Advisory)
- github.com/golang/go/issues/19767 (Third Party Advisory)
- bridge.grumpy-troll.org/2017/04/golang-ssh-security/ (Third Party Advisory)
- github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991 (Patch, Third Party Advisory)
- www.securityfocus.com/bid/97481 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-3204?
- CVE-2017-3204 is a high-severity vulnerability in Go SSH Library, classified under Cryptographic Issues. CVSS score: 8.1/10. Published 2017-04-04.
- How severe is CVE-2017-3204?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2017-3204 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.