CVE-2022-46353 Weak cryptography in SCALANCE X204RNA (HSR)

Q: Is CVE-2022-46353 being exploited?

There is no known exploitation of CVE-2022-46353 in the wild and no public exploit code.

Q: How do I fix CVE-2022-46353?

No fix has been published for CVE-2022-46353 yet. Limit exposure of the affected software until one is available.

Critical 9.8 Published 13 Dec 2022 Updated 22 Apr 2025

An attacker can hijack sessions by brute-forcing insecurely generated session IDs on Siemens SCALANCE switches, requiring an upgrade to secure versions.

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-2022-46353?

CVE-2022-46353 is a critical vulnerability in Siemens SCALANCE X204RNA (HSR), published on 13 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been identified in SCALANCE X204RNA (HSR) (All versions < V3.2.7), SCALANCE X204RNA (PRP) (All versions < V3.2.7), SCALANCE X204RNA EEC (HSR) (All versions < V3.2.7), SCALANCE X204RNA EEC (PRP) (All versions < V3.2.7), SCALANCE X204RNA EEC (PRP/HSR) (All versions < V3.2.7). The webserver of affected devices calculates session ids and nonces in an insecure manner. This could allow an unauthenticated remote attacker to brute-force session ids and hijack existing sessions.

Weakness: CWE-330

Which versions are affected by CVE-2022-46353?

It affects 5 products.

Products include Siemens 6gk5204-0ba00-2kb2 Firmware, Siemens 6gk5204-0ba00-2mb2 Firmware, Siemens 6gk5204-0bs00-2na3 Firmware, Siemens 6gk5204-0bs00-3la3 Firmware, Siemens 6gk5204-0bs00-3pa3 Firmware.

How do I fix CVE-2022-46353?

No fix has been published for CVE-2022-46353 yet. Limit exposure of the affected software until one is available.

Is CVE-2022-46353 being exploited?

There is no known exploitation of CVE-2022-46353 in the wild and no public exploit code.

Sources

Also known as GHSA-pvv4-8wmw-vjf3.