CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2021-31642
Medium (6.5) in chiyu-tech. EPSS 44% chance of exploitation in the next 30 days.
A denial of service condition exists after an integer overflow in several IoT devices from CHIYU Technology, including BIOSENSE, Webpass, and BF-630, BF-631, and SEMAC. The vulnerability can be explored by sending an unexpected integer (> 32 bits) on the page parameter that will crash the web portal and making it unavailable until a reboot of the device.
Severity
- EPSS
- 44% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
- CWE
- CWE-190
- Published
- Modified
- Record from
- the NVD, synced
Affected
- chiyu-tech:bf-630_firmware
- chiyu-tech:bf-631_firmware
- chiyu-tech:biosense_firmware
- chiyu-tech:semac_d1_firmware
- chiyu-tech:semac_d2_firmware
- chiyu-tech:semac_d2_n300_firmware
- chiyu-tech:semac_d4_firmware
- chiyu-tech:semac_s1_osdp_firmware
- chiyu-tech:semac_s2_firmware
- chiyu-tech:semac_s3v3_firmware
- chiyu-tech:webpass_firmware
References
- http://packetstormsecurity.com/files/162934/CHIYU-IoT-Denial-Of-Service.html
- https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31642
- https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/
- https://www.chiyu-tech.com/msg/message-Firmware-update-87.html
- http://packetstormsecurity.com/files/162934/CHIYU-IoT-Denial-Of-Service.html