CVE-2020-6994 Memory corruption in HiOS for the following devices RSP, RSPE, RSPS, RSPL, MSP, EES, EES, EESX, GRS, OS, RED

Critical 9.8 Published 3 Apr 2020 Updated 4 Aug 2024

Buffer overflow in Hirschmann HiOS/HiSecOS devices allows remote code execution or denial of service via crafted HTTP requests.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-6994?

CVE-2020-6994 is a critical memory corruption vulnerability in Hirschmann Automation and Control GmbH, a division of Belden Inc. HiOS for the following devices RSP, RSPE, RSPS, RSPL, MSP, EES, EES, EESX, GRS, OS, RED, published on 3 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A buffer overflow vulnerability was found in some devices of Hirschmann Automation and Control HiOS and HiSecOS. The vulnerability is due to improper parsing of URL arguments. An attacker could exploit this vulnerability by specially crafting HTTP requests to overflow an internal buffer. The following devices using HiOS Version 07.0.02 and lower are affected: RSP, RSPE, RSPS, RSPL, MSP, EES, EES, EESX, GRS, OS, RED. The following devices using HiSecOS Version 03.2.00 and lower are affected: EAGLE20/30.

Weakness: CWE-120, CWE-12

Which versions are affected by CVE-2020-6994?

It affects 2 products.

Products include Belden Hirschmann Hios, Belden Hirschmann Hisecos.

How do I fix CVE-2020-6994?

No fix has been published for CVE-2020-6994 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-6994 being exploited?

There is no known exploitation of CVE-2020-6994 in the wild and no public exploit code.

Sources

Also known as GHSA-299q-28qj-ch6v.