Vulnerability Details CVE-2021-33541
Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.013
EPSS Ranking 78.7%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 7.8
References
Products affected by CVE-2021-33541
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cpe:2.3:h:phoenixcontact:ilc1x0:-
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cpe:2.3:h:phoenixcontact:ilc1x1:-
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cpe:2.3:o:phoenixcontact:ilc1x0_firmware:-
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cpe:2.3:o:phoenixcontact:ilc1x1_firmware:-