CVE-2021-34570
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductPhoenixcontact Plcnext Technology Starterkit Firmware
PublishedSep 27, 2021
First seenSep 27, 2021
Weakness typeCWE-20Improper input validation
How to fix
Update
- phoenixcontact plcnext_technology_starterkit_firmware2021.0.5 or later
- phoenixcontact axc_f_2152_starterkit_firmware2021.0.5 or later
- phoenixcontact rfc_4072s_firmware2021.0.5 or later
- phoenixcontact axc_f_3152_firmware2021.0.5 or later
- phoenixcontact axc_f_1152_firmware2021.0.5 or later
- phoenixcontact axc_f_2152_firmware2021.0.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| phoenixcontact plcnext_technology_starterkit_firmware | v < 2021.0.5 | 2021.0.5 |
| phoenixcontact axc_f_2152_starterkit_firmware | v < 2021.0.5 | 2021.0.5 |
| phoenixcontact rfc_4072s_firmware | v < 2021.0.5 | 2021.0.5 |
| phoenixcontact axc_f_3152_firmware | v < 2021.0.5 | 2021.0.5 |
| phoenixcontact axc_f_1152_firmware | v < 2021.0.5 | 2021.0.5 |
| phoenixcontact axc_f_2152_firmware | v < 2021.0.5 | 2021.0.5 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.