CVE-2021-31251
Chiyu Technology Inc Telnet Server Authentication Bypass Vulnerability
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.
INFO
Published Date :
June 4, 2021, 9:15 p.m.
Last Modified :
Nov. 21, 2024, 6:05 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2021-31251
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-31251.
| URL | Resource |
|---|---|
| https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251 | Exploit Third Party Advisory |
| https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU | Exploit Third Party Advisory |
| 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 | Exploit Third Party Advisory |
| https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU | Exploit Third Party Advisory |
| https://www.chiyu-tech.com/msg/message-Firmware-update-87.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-31251 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-31251
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-31251 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-31251 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251 Added Reference https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU Added Reference https://www.chiyu-tech.com/msg/message-Firmware-update-87.html -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jun. 08, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251 No Types Assigned https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251 Exploit, Third Party Advisory Changed Reference Type https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU No Types Assigned https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU Exploit, Third Party Advisory Changed Reference Type https://www.chiyu-tech.com/msg/message-Firmware-update-87.html No Types Assigned https://www.chiyu-tech.com/msg/message-Firmware-update-87.html Vendor Advisory Added CWE NIST CWE-287 Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:bf-430_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:bf-430:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:bf-431_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:bf-431:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:bf-450m_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:bf-450m:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:semac_s2_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:semac_s2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:semac_d1_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:semac_d1:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:semac_d2_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:semac_d2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:semac_d4_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:semac_d4:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:semac_s3v3_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:semac_s3v3:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:semac_d2_n300_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:semac_d2_n300:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:chiyu-tech:semac_s1_osdp_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:chiyu-tech:semac_s1_osdp:-:*:*:*:*:*:*:*
Vulnerability Scoring Details
Base CVSS Score: 9.8
Base CVSS Score: 7.5
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
9.59 }} -27.62%
score
0.92118
percentile