Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2020-12494

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.

Published

2020-06-16T14:15:10.977

Last Modified

2024-11-21T04:59:47.893

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-459
  • Type: Secondary
    CWE-459
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application beckhoff twincat_driver ≤ 3.1.0.3603 Yes
Application beckhoff twincat 3.1 No
Hardware intel 82540em - No
Hardware intel 82540ep - No
Hardware intel 82541ei - No
Hardware intel 82541er - No
Hardware intel 82541gi - No
Hardware intel 82541pi - No
Hardware intel 82544ei - No
Hardware intel 82544gc - No
Hardware intel 82545em - No
Hardware intel 82545gm - No
Hardware intel 82546eb - No
Hardware intel 82546gb - No
Hardware intel 82547ei - No
Hardware intel 82547gi - No
Application beckhoff twincat ≤ 3.1.0.3512 Yes
Application beckhoff twincat 3.1 No
Hardware intel 82540em - No
Hardware intel 82540ep - No
Hardware intel 82541ei - No
Hardware intel 82541er - No
Hardware intel 82541gi - No
Hardware intel 82541pi - No
Hardware intel 82544ei - No
Hardware intel 82544gc - No
Hardware intel 82545em - No
Hardware intel 82545gm - No
Hardware intel 82546eb - No
Hardware intel 82546gb - No
Hardware intel 82547ei_ - No
Hardware intel 82547gi - No
Application beckhoff twincat ≤ 2.11.0.2120 Yes
Application beckhoff twincat 2.11 No
Hardware intel 82540em - No
Hardware intel 82540ep - No
Hardware intel 82541ei - No
Hardware intel 82541er - No
Hardware intel 82541gi - No
Hardware intel 82541pi - No
Hardware intel 82544ei - No
Hardware intel 82544gc - No
Hardware intel 82545em - No
Hardware intel 82545gm - No
Hardware intel 82546eb - No
Hardware intel 82546gb - No
Hardware intel 82547ei_ - No
Hardware intel 82547gi - No
Application beckhoff twincat ≤ 3.1.0.3600 Yes
Application beckhoff twincat 3.1 No
Hardware intel 82557 - No
Hardware intel 82558 - No
Hardware intel 82559 - No
Application beckhoff twincat ≤ 3.1.0.3500 Yes
Application beckhoff twincat 3.1 No
Hardware intel 82557 - No
Hardware intel 82558 - No
Hardware intel 82559 - No
Application beckhoff twincat ≤ 2.11.0.2117 Yes
Application beckhoff twincat 2.11 No
Hardware intel 82557 - No
Hardware intel 82558 - No
Hardware intel 82559 - No
References