CVE-2020-12494
Beckhoff TwinCAT RT EtherCAT Network Driver Information Disclosure
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.
INFO
Published Date :
June 16, 2020, 2:15 p.m.
Last Modified :
Dec. 2, 2021, 7:31 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-12494.
| URL | Resource |
|---|---|
| https://cert.vde.com/en-us/advisories/vde-2020-019 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-12494 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-12494 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Dec. 02, 2021
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 10, 2021
Action Type Old Value New Value Removed CWE CERT@VDE CWE-200 Added CWE CERT@VDE CWE-459 Removed CWE Reason CWE-200 / More specific CWE option available -
Reanalysis by [email protected]
Nov. 04, 2021
Action Type Old Value New Value Removed CWE NIST CWE-200 Added CWE NIST CWE-459 -
Initial Analysis by [email protected]
Jul. 01, 2020
Action Type Old Value New Value 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 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 Added CWE NIST CWE-200 Added CPE Configuration 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:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82544ei:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82544gc:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82545em:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82545gm:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82546eb:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82546gb:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82547ei:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82547gi:-:*:*:*:*:*:*:* Added CPE Configuration 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:2.3:h:intel:82544ei:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82544gc:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82545em:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82545gm:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82546eb:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82546gb:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82547ei_:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82547gi:-:*:*:*:*:*:*:* Added CPE Configuration 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:2.3:h:intel:82544ei:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82544gc:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82545em:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82545gm:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82546eb:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82546gb:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82547ei_:-:*:*:*:*:*:*:* cpe:2.3:h:intel:82547gi:-:*:*:*:*:*:*:* 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:-:*:*:*:*:*:*:* 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:-:*:*:*:*:*:*:* Added CPE Configuration 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:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 19, 2020
Action Type Old Value New Value Changed 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. 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.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-12494 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-12494
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.00%
score
0.33936
percentile