An authenticated attacker can send a malformed packet to trigger a device crash via the CODESYS V2 runtime commands parsing.

Update: 08.07.2024 release date of the updates has been changed.



An unauthenticated attacker with network access to port 502/TCP of the target device can cause a denial-of-service condition by sending multiple specially crafted packets. The MODBUS server does not properly release memory resources that were reserved for incomplete connection attempts by MODBUS clients. This could allow a remote attacker to generate a denial of service condition on devices that incorporate a vulnerable version of the MODBUS server.



The FL MGUARD family of devices is affected by two vulnerabilities.



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(Scoring for CVSS 2.0,3.0+3.1)
None
No CVE available
Low
0.1 <= 3.9
Medium
4.0 <= 6.9
High
7.0 <= 8.9
Critical
9.0 <= 10.0