9.8

CVE-2021-31251

Exploit
An authentication bypass in telnet server in BF-430 and BF431 232/422 TCP/IP Converter, BF-450M and SEMAC from CHIYU Technology Inc allows obtaining a privileged connection with the target device by supplying a specially malformed request and an attacker may force the remote telnet server to believe that the user has already authenticated.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Chiyu-tech ≫ Bf-430 Firmware Version -
   Chiyu-tech ≫ Bf-430 Version -
Chiyu-tech ≫ Bf-431 Firmware Version -
   Chiyu-tech ≫ Bf-431 Version -
Chiyu-tech ≫ Bf-450m Firmware Version -
   Chiyu-tech ≫ Bf-450m Version -
Chiyu-tech ≫ Semac S2 Firmware Version -
   Chiyu-tech ≫ Semac S2 Version -
Chiyu-tech ≫ Semac D1 Firmware Version -
   Chiyu-tech ≫ Semac D1 Version -
Chiyu-tech ≫ Semac D2 Firmware Version -
   Chiyu-tech ≫ Semac D2 Version -
Chiyu-tech ≫ Semac D4 Firmware Version -
   Chiyu-tech ≫ Semac D4 Version -
Chiyu-tech ≫ Semac S3v3 Firmware Version -
   Chiyu-tech ≫ Semac S3v3 Version -
Chiyu-tech ≫ Semac D2 N300 Firmware Version -
   Chiyu-tech ≫ Semac D2 N300 Version -
Chiyu-tech ≫ Semac S1 Osdp Firmware Version -
   Chiyu-tech ≫ Semac S1 Osdp Version -
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 35.71% 0.983
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NIST 7.5 10 6.4
AV:N/AC:L/Au:N/C:P/I:P/A:P
CWE-287 Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

https://www.chiyu-tech.com/msg/message-Firmware-update-87.html
Vendor Advisory
https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251
Third Party Advisory
Exploit
https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU
Third Party Advisory
Exploit