CVE-2021-20597 Information disclosure in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU
Remote attackers can sniff network traffic to steal credentials during user registration or password changes, allowing unauthorized access to Mitsubishi safety and process CPU modules.
- 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-2021-20597?
CVE-2021-20597 is a critical vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU, published on 6 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Insufficiently Protected Credentials vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and prior and Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to login to the target unauthorizedly by sniffing network traffic and obtaining credentials when registering user information in the target or changing a password.
Weakness: CWE-522
Which versions are affected by CVE-2021-20597?
It affects 8 products.
Products include Mitsubishielectric R08psfcpu Firmware, Mitsubishielectric R08sfcpu Firmware, Mitsubishielectric R120psfcpu Firmware, Mitsubishielectric R120sfcpu Firmware, Mitsubishielectric R16psfcpu Firmware, Mitsubishielectric R16sfcpu Firmware and 2 more.
How do I fix CVE-2021-20597?
No fix has been published for CVE-2021-20597 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-20597 being exploited?
There is no known exploitation of CVE-2021-20597 in the wild and no public exploit code.
Other vulnerabilities in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU
- CVE-2021-20599 Information disclosure in MELSEC iQ-R Series SIL2 Process CPU R08PSFCPU
- CVE-2021-20594 Information disclosure in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU
- CVE-2023-6815 Information disclosure in MELSEC iQ-R Series SIL2 Process CPU R08PSFCPU
- CVE-2021-20598 Denial of service in MELSEC iQ-R series CPU modules R08/16/32/120SFCPU; R08/16/32/120PSFCPU
Sources
Also known as GHSA-46vr-p4g8-f826.