High severity · published Sep 27, 2021
CVE-2021-34570
Multiple Phoenix Contact PLCnext control devices in versions prior to 2021.0.5 LTS are prone to a DoS attack through special crafted JSON requests
7.5
CVSS
1%
EPSS
No
On KEV
Description
Multiple Phoenix Contact PLCnext control devices in versions prior to 2021.0.5 LTS are prone to a DoS attack through special crafted JSON requests.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
Axc F 1152 Firmware · Phoenixcontact
before 2021.0.5 · source: NVD
AF
Axc F 2152 Firmware · Phoenixcontact
before 2021.0.5 · source: NVD
AF
Axc F 2152 Starterkit Firmware · Phoenixcontact
before 2021.0.5 · source: NVD
AF
Axc F 3152 Firmware · Phoenixcontact
before 2021.0.5 · source: NVD
PT
Plcnext Technology Starterkit Firmware · Phoenixcontact
before 2021.0.5 · source: NVD
R4
Rfc 4072s Firmware · Phoenixcontact
before 2021.0.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34570
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34570
Patch
https://cert.vde.com/en/advisories/VDE-2021-029/
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