CVE-2020-12494
Summary
| CVE | CVE-2020-12494 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-06-16 14:15:00 UTC |
| Updated | 2021-12-02 19:31:00 UTC |
| 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. |
Risk And Classification
Problem Types: CWE-459
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Beckhoff | Twincat | 2.11 | build_2350 | All | All |
| Application | Beckhoff | Twincat | 3.1 | build_402 | All | All |
| Application | Beckhoff | Twincat | 3.1 | build_4022 | All | All |
| Application | Beckhoff | Twincat | 3.1 | build_4024 | All | All |
| Application | Beckhoff | Twincat | 2.11 | build_2350 | All | All |
| Application | Beckhoff | Twincat | 3.1 | build_402 | All | All |
| Application | Beckhoff | Twincat | 3.1 | build_4022 | All | All |
| Application | Beckhoff | Twincat | 3.1 | build_4024 | All | All |
| Application | Beckhoff | Twincat | All | All | All | All |
| Application | Beckhoff | Twincat | All | All | All | All |
| Application | Beckhoff | Twincat | All | All | All | All |
| Application | Beckhoff | Twincat | All | All | All | All |
| Application | Beckhoff | Twincat | All | All | All | All |
| Application | Beckhoff | Twincat Driver | All | All | All | All |
| Hardware | Intel | 82540em | - | All | All | All |
| Hardware | Intel | 82540em | - | All | All | All |
| Hardware | Intel | 82540ep | - | All | All | All |
| Hardware | Intel | 82540ep | - | All | All | All |
| Hardware | Intel | 82541ei | - | All | All | All |
| Hardware | Intel | 82541ei | - | All | All | All |
| Hardware | Intel | 82541er | - | All | All | All |
| Hardware | Intel | 82541er | - | All | All | All |
| Hardware | Intel | 82541gi | - | All | All | All |
| Hardware | Intel | 82541gi | - | All | All | All |
| Hardware | Intel | 82541pi | - | All | All | All |
| Hardware | Intel | 82541pi | - | All | All | All |
| Hardware | Intel | 82544ei | - | All | All | All |
| Hardware | Intel | 82544ei | - | All | All | All |
| Hardware | Intel | 82544gc | - | All | All | All |
| Hardware | Intel | 82544gc | - | All | All | All |
| Hardware | Intel | 82545em | - | All | All | All |
| Hardware | Intel | 82545em | - | All | All | All |
| Hardware | Intel | 82545gm | - | All | All | All |
| Hardware | Intel | 82545gm | - | All | All | All |
| Hardware | Intel | 82546eb | - | All | All | All |
| Hardware | Intel | 82546eb | - | All | All | All |
| Hardware | Intel | 82546gb | - | All | All | All |
| Hardware | Intel | 82546gb | - | All | All | All |
| Hardware | Intel | 82547ei | - | All | All | All |
| Hardware | Intel | 82547ei | - | All | All | All |
| Hardware | Intel | 82547ei | - | All | All | All |
| Hardware | Intel | 82547ei | - | All | All | All |
| Hardware | Intel | 82547gi | - | All | All | All |
| Hardware | Intel | 82547gi | - | All | All | All |
| Hardware | Intel | 82557 | - | All | All | All |
| Hardware | Intel | 82557 | - | All | All | All |
| Hardware | Intel | 82558 | - | All | All | All |
| Hardware | Intel | 82558 | - | All | All | All |
| Hardware | Intel | 82559 | - | All | All | All |
| Hardware | Intel | 82559 | - | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| BECKHOFF: EtherLeak in TwinCAT RT network driver — English (USA) | CONFIRM | cert.vde.com | Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
LEGACY: Beckhoff reported this vulnerability to CERT@VDE
There are currently no legacy QID mappings associated with this CVE.