CVE-2021-31251 Auth bypass in n/a
Attackers can bypass telnet authentication on CHIYU TCP/IP converters to gain privileged access and potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-31251?
CVE-2021-31251 is a critical authentication bypass vulnerability in n/a, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2021-31251?
It affects 10 products.
Products include Chiyu-Tech Bf-430 Firmware, Chiyu-Tech Bf-431 Firmware, Chiyu-Tech Bf-450m Firmware, Chiyu-Tech Semac D1 Firmware, Chiyu-Tech Semac D2 Firmware, Chiyu-Tech Semac D2 N300 Firmware and 4 more.
How do I fix CVE-2021-31251?
No fix has been published for CVE-2021-31251 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-31251 being exploited?
There is no known exploitation of CVE-2021-31251 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in n/a
Sources
Also known as GHSA-fr6h-7w99-6jxc.