VulnerabilityModified
CVE-2017-3204
The Go SSH library (x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks.
HIGH 8.1EPSS 3.16%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.16% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-310
- Affected
- golang/crypto
- Source
- cret@cert.org
References
- http://www.securityfocus.com/bid/97481Third Party Advisory, VDB Entry
- https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/Third Party Advisory
- https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991Patch, Third Party Advisory
- https://github.com/golang/go/issues/19767Third Party Advisory
- https://godoc.org/golang.org/x/crypto/sshVendor Advisory
- http://www.securityfocus.com/bid/97481Third Party Advisory, VDB Entry
- https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/Third Party Advisory
- https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991Patch, Third Party Advisory
- https://github.com/golang/go/issues/19767Third Party Advisory
- https://godoc.org/golang.org/x/crypto/sshVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.