CVE-2021-22731 Auth bypass in Modicon Managed Switch MCSESM* and MCSESP* V8.21 and prior
Remote attackers can change passwords via HTTP/HTTPS if basic user info is known, leading to unauthorized access on Modicon switches.
- 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-2021-22731?
CVE-2021-22731 is a critical authentication bypass vulnerability in Modicon Managed Switch MCSESM* and MCSESP* V8.21 and prior, published on 26 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Weak Password Recovery Mechanism for Forgotten Password vulnerability exists on Modicon Managed Switch MCSESM* and MCSESP* V8.21 and prior which could cause an unauthorized password change through HTTP / HTTPS when basic user information is known by a remote attacker.
Weakness: CWE-640
Which versions are affected by CVE-2021-22731?
It affects 16 products.
Products include Schneider-Electric Mcsesm043f23f0 Firmware, Schneider-Electric Mcsesm053f1cs0 Firmware, Schneider-Electric Mcsesm053f1cu0 Firmware, Schneider-Electric Mcsesm063f2cs0 Firmware, Schneider-Electric Mcsesm063f2cu0 Firmware, Schneider-Electric Mcsesm083f23f0 Firmware and 10 more.
How do I fix CVE-2021-22731?
No fix has been published for CVE-2021-22731 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-2021-22731 being exploited?
There is no known exploitation of CVE-2021-22731 in the wild and no public exploit code.
Sources
Also known as GHSA-6q5v-82v5-mpf9.