CVE-2021-31642 is a Denial of Service (DoS) vulnerability affecting several CHIYU Technology IoT devices, including BIOSENSE, Webpass, BF-630, BF-631, and SEMAC. An integer overflow occurs when an attacker sends an unexpectedly large integer in the 'page' parameter, causing the device's web portal to crash and become unavailable until a manual reboot. Rated with a CVSS score of 6.5 (Medium), this vulnerability can be exploited remotely with low attack complexity and requires low privileges, leading to a high impact on availability. There is no impact on confidentiality or integrity. While not listed on CISA's KEV catalog or the Hot List, exploit code for this vulnerability is publicly available on ExploitDB (EDB-49937). There is no evidence of active exploitation, and it has received minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:chiyu-tech:semac_s2_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:chiyu-tech:semac_d1_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:chiyu-tech:semac_d2_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:chiyu-tech:semac_d4_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:chiyu-tech:semac_s3v3_firmware:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.