CVE-2021-21778

CVE-2021-21778 affects MZ Automation GmbH’s lib60870.NET 2.2.0. The denial-of-service arises in the ASDU message processing path when handling IEC60870-5-104 messages. According to TALOS, the vulnerable code checks if (msgLength - bufPos) is large enough for the ASDU header, but if this check fai...