VDE-2021-040 — Endress+Hauser: Promass 83 with EtherNet/IP affected by a stack-based buffer overflow

Summary

Promass 83 devices utilizing 499ES EtherNet/IP (ENIP) Stack by Real Time Automation (RTA) are vulnerable to a stack-based buffer overflow.

Update A, 2021-10-07:

added credits
changed title from "ENDRESS+HAUSER: Promass 83 with Ether/IP affected by DoS vulnerability" to "ENDRESS+HAUSER: Promass 83 with EtherNet/IP affected by a stack-based buffer overflow"

Details

Impact
The vulnerability described can lead to a denial of service or even remote code execution.

Mitigation
If an immediate firmware update is not possible, the only way to prevent an attack is to disable communication via EtherNet/IP.

Remediation
Endress+Hauser provides updated firmware versions (Firmware versions >1.00.00) for the related product from the Proline portfolio which fixes the vulnerability. Endress+Hauser strongly recommends customers to update to the new fixed version. For support, please contact your local service center.

Vulnerabilities 1

Unscored —

CVE-2020-25159

Real Time Automation EtherNet/IP

499ES EtherNet/IP (ENIP) Adaptor Source Code is vulnerable to a stack-based buffer overflow, which may allow an attacker to send a specially crafted packet that may result in a denial-of-service condition or code execution.

Real Time Automation 499ES EtherNet/IP (ENIP) Adaptor Source Code

Nov 24, 2020

Revision history

2025-05-14 #3
Fix: firmware category, added distribution
2021-10-07 #2
Update A
2021-10-04 #1
Initial revision.

References

Endress+Hauser advisory overview at CERT@VDE
https://certvde.com/de/advisories/vendor/endress+hauser/
VDE-2021-040: Endress+Hauser: Promass 83 with EtherNet/IP affected by a stack-based buffer overflow - HTML
https://certvde.com/en/advisories/VDE-2021-040