CVE-2017-1000209

low-risk
Published 2017-11-17

The Java WebSocket client nv-websocket-client does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL/TLS servers via an arbitrary valid certificate.

Do I need to act?

-
0.12% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Nv-Websocket-Client

Affected Vendors

Nv-Websocket-Client Project

References (2)

Third Party Advisory https://github.com/TakahikoKawasaki/nv-websocket-client/pull/107
Third Party Advisory https://github.com/TakahikoKawasaki/nv-websocket-client/pull/107
24
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal