Description
Beckhoff's TwinCAT RT network driver for Intel 8254x and 8255x is providing EtherCAT functionality. The driver implements real-time features. Except for Ethernet frames sent from real-time functionality, all other Ethernet frames sent through the driver are not padded if their payload is less than the minimum Ethernet frame size. Instead, arbitrary memory content is transmitted within in the padding bytes of the frame. Most likely this memory contains slices from previously transmitted or received frames. By this method, memory content is disclosed, however, an attacker can hardly control which memory content is affected. For example, the disclosure can be provoked with small sized ICMP echo requests sent to the device.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Beckhoff TwinCat Driver for Intel 8254x (Tcl8254x.sys)
unspecified to ≤ 3.1.0.3603 for TwinCAT 3.1 4024affectedunspecified to ≤ 3.1.0.3512 for TwinCAT 3.1 4022affectedunspecified to ≤ 2.11.0.2120 for TwinCAT 2.11 2350affected
Beckhoff TwinCat Driver for Intel 8255x (Tcl8255x.sys)
unspecified to ≤ 3.1.0.3600 for TwinCAT 3.1 4024affectedunspecified to ≤ 3.1.0.3500 for TwinCAT 3.1 4024affectedunspecified to ≤ 2.11.0.2117 for TwinCAT 2.11 2350affected