CVE-2018-4832 Denial of service in OpenPCS 7 V7.1 and earlier

Q: Is CVE-2018-4832 being exploited?

There is no known exploitation of CVE-2018-4832 in the wild and no public exploit code.

Q: How do I fix CVE-2018-4832?

No fix has been published for CVE-2018-4832 yet. Limit exposure of the affected software until one is available.

High 7.5 Published 24 Apr 2018 Updated 5 Aug 2024

Remote attackers can cause denial of service in Siemens SIMATIC products by sending crafted RPC messages, requiring a system reboot to recover.

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-2018-4832?

CVE-2018-4832 is a high-severity denial of service vulnerability in Siemens OpenPCS 7 V7.1 and earlier, published on 24 Apr 2018. 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 OpenPCS 7 V7.1 and earlier (All versions), OpenPCS 7 V8.0 (All versions), OpenPCS 7 V8.1 (All versions < V8.1 Upd5), OpenPCS 7 V8.2 (All versions), OpenPCS 7 V9.0 (All versions < V9.0 Upd1), SIMATIC BATCH V7.1 and earlier (All versions), SIMATIC BATCH V8.0 (All versions < V8.0 SP1 Upd21), SIMATIC BATCH V8.1 (All versions < V8.1 SP1 Upd16), SIMATIC BATCH V8.2 (All versions < V8.2 Upd10), SIMATIC BATCH V9.0 (All versions < V9.0 SP1), SIMATIC NET PC Software V14 (All versions < V14 SP1 Update 14), SIMATIC NET PC Software V15 (All versions < 15 SP1), SIMATIC PCS 7 V7.1 and earlier (All versions), SIMATIC PCS 7 V8.0 (All versions), SIMATIC PCS 7 V8.1 (All versions), SIMATIC PCS 7 V8.2 (All versions < V8.2 SP1), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP1), SIMATIC Route Control V7.1 and earlier (All versions), SIMATIC Route Control V8.0 (All versions), SIMATIC Route Control V8.1 (All versions), SIMATIC Route Control V8.2 (All versions), SIMATIC Route Control V9.0 (All versions < V9.0 Upd1), SIMATIC WinCC Runtime Professional V13 (All versions < V13 SP2 Upd2), SIMATIC WinCC Runtime Professional V14 (All versions < V14 SP1 Upd5), SIMATIC WinCC V7.2 and earlier (All versions < WinCC 7.2 Upd 15), SIMATIC WinCC V7.3 (All versions < WinCC 7.3 Upd 16), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Upd 4), SPPA-T3000 Application Server (All versions < Service Pack R8.2 SP2). Specially crafted messages sent to the RPC service of the affected products could cause a Denial-of-Service condition on the remote and local communication functionality of the affected products. A reboot of the system is required to recover the remote and local communication functionality. Please note that an attacker needs to have network access to the Application Server in order to exploit this vulnerability. At the time of advisory publication no public exploitation of this security vulnerability was known.

Weakness: CWE-20

Which versions are affected by CVE-2018-4832?

It affects 9 products.

Products include Siemens Openpcs 7, Siemens Simatic Batch, Siemens Simatic Net Pc, Siemens Simatic Net Pc Software, Siemens Simatic Pcs 7, Siemens Simatic Route Control and 3 more.

How do I fix CVE-2018-4832?

No fix has been published for CVE-2018-4832 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-4832 being exploited?

There is no known exploitation of CVE-2018-4832 in the wild and no public exploit code.

Sources

Also known as GHSA-gx8w-56ch-h8w4.