National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2017-3204 Detail

Current 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.

Source:  MITRE
Description Last Modified:  04/04/2017
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 8.1 HIGH
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 2.2

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 6.8 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 8.6

Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securityfocus.com/bid/97481 Third Party Advisory VDB Entry
https://bridge.grumpy-troll.org/2017/04/golang-ssh-security/ Third Party Advisory
https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991 Patch Third Party Advisory
https://github.com/golang/go/issues/19767 Third Party Advisory
https://godoc.org/golang.org/x/crypto/ssh Vendor Advisory

Technical Details

Vulnerability Type (View All)

Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-3204
NVD Published Date:
04/04/2017
NVD Last Modified:
04/11/2017