CVE-2021-31251

CRITICAL

9.8

Description

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published6/4/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

chiyu-tech:bf-430chiyu-tech:bf-430_firmwarechiyu-tech:bf-431chiyu-tech:bf-431_firmwarechiyu-tech:bf-450mchiyu-tech:bf-450m_firmwarechiyu-tech:semac_d1chiyu-tech:semac_d1_firmwarechiyu-tech:semac_d2chiyu-tech:semac_d2_firmwarechiyu-tech:semac_d2_n300chiyu-tech:semac_d2_n300_firmwarechiyu-tech:semac_d4chiyu-tech:semac_d4_firmwarechiyu-tech:semac_s1_osdpchiyu-tech:semac_s1_osdp_firmwarechiyu-tech:semac_s2chiyu-tech:semac_s2_firmwarechiyu-tech:semac_s3v3chiyu-tech:semac_s3v3_firmware

Weaknesses (CWE)

CWE-287

References

https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251(cve@mitre.org)

https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU(cve@mitre.org)

https://www.chiyu-tech.com/msg/message-Firmware-update-87.html(cve@mitre.org)

https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251(af854a3a-2127-422b-91ae-364da2661108)

https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU(af854a3a-2127-422b-91ae-364da2661108)

https://www.chiyu-tech.com/msg/message-Firmware-update-87.html(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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