Beckhoff: Etherleak in TwinCAT RT network driver
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Beckhoff TwinCat Driver for Intel 8254x (Tcl8254x.sys)
through 3.1.0.3603 for TwinCAT 3.1 4024; through 3.1.0.3512 for TwinCAT 3.1 4022; through 2.11.0.2120 for TwinCAT 2.11 2350
- Beckhoff TwinCat Driver for Intel 8255x (Tcl8255x.sys)
through 3.1.0.3600 for TwinCAT 3.1 4024; through 3.1.0.3500 for TwinCAT 3.1 4024; through 2.11.0.2117 for TwinCAT 2.11 2350