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Advisories specifiek gericht op industriële besturingssystemen — van CISA ICS-CERT en rechtstreeks van leveranciers (onder meer Siemens, ABB, Schneider Electric, WAGO en Phoenix Contact) — inclusief revisiegeschiedenis (initiële publicatie, Update A, Update B) en gekoppelde CVE's.
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Advisorydata: live koppeling— laatst opgehaald: 7 november 2026 om 13:52.
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VDE-2020-019
Beckhoff: EtherLeak in TwinCAT RT network driver
Risk evaluation
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.
Mitigatiesamenvatting
Beckhoff offers software patches for TwinCAT 3.1 and TwinCAT 2.11 on request. These patches will be included in the the next regular releases to the affected software versions. The advisory will be updated upon availability.
Revisiegeschiedenis (4)
Initiële publicatie — 16 juni 2020
Initial revision.
Update A — 6 november 2024
Fix: added self-reference
Update B — 11 april 2025
Fix: version range
Update C — 22 mei 2025
Fix: added distribution, quotation mark