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CVE-2020-12494
Detail
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.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.
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AND
OR
*cpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:* versions up to (including) 2.11.0.2117
OR
cpe:2.3:a:beckhoff:twincat:2.11:build_2350:*:*:*:*:*:*
OR
cpe:2.3:h:intel:82557:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82558:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82559:-:*:*:*:*:*:*:*
AND
OR
*cpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:* versions up to (including) 2.11.0.2120
OR
cpe:2.3:a:beckhoff:twincat:2.11:build_2350:*:*:*:*:*:*
OR
cpe:2.3:h:intel:82540em:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82540ep:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541ei:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541er:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541gi:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541pi:-:*:*:*:*:*:*:*
cpe:
Added
CPE Configuration
AND
OR
*cpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:* versions up to (including) 3.1.0.3500
OR
cpe:2.3:a:beckhoff:twincat:3.1:build_4024:*:*:*:*:*:*
OR
cpe:2.3:h:intel:82557:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82558:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82559:-:*:*:*:*:*:*:*
AND
OR
*cpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:* versions up to (including) 3.1.0.3512
OR
cpe:2.3:a:beckhoff:twincat:3.1:build_4022:*:*:*:*:*:*
OR
cpe:2.3:h:intel:82540em:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82540ep:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541ei:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541er:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541gi:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541pi:-:*:*:*:*:*:*:*
cpe:2.
Added
CPE Configuration
AND
OR
*cpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:* versions up to (including) 3.1.0.3600
OR
cpe:2.3:a:beckhoff:twincat:3.1:build_402:*:*:*:*:*:*
OR
cpe:2.3:h:intel:82557:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82558:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82559:-:*:*:*:*:*:*:*
AND
OR
*cpe:2.3:a:beckhoff:twincat_driver:*:*:*:*:*:*:*:* versions up to (including) 3.1.0.3603
OR
cpe:2.3:a:beckhoff:twincat:3.1:build_4024:*:*:*:*:*:*
OR
cpe:2.3:h:intel:82540em:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82540ep:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541ei:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541er:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541gi:-:*:*:*:*:*:*:*
cpe:2.3:h:intel:82541pi:-:*:*:*:*:*:*:*
Added
CVSS V2
NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Added
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Added
CWE
NIST CWE-200
Changed
Reference Type
https://cert.vde.com/en-us/advisories/vde-2020-019 No Types Assigned
https://cert.vde.com/en-us/advisories/vde-2020-019 Third Party Advisory
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 rece
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 receiv
Quick Info
CVE Dictionary Entry: CVE-2020-12494 NVD
Published Date: 06/16/2020 NVD
Last Modified: 12/02/2021
Source: CERT VDE