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CVE-2023-29105 Denial of service in SIMATIC Cloud Connect 7 CC712

Medium 5.9 Published Updated

An attacker can cause a denial of service on Siemens SIMATIC Cloud Connect devices by sending malformed MQTT payloads.

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-2023-29105?

CVE-2023-29105 is a medium-severity denial of service vulnerability in Siemens SIMATIC Cloud Connect 7 CC712, published on 9 May 2023. 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 SIMATIC Cloud Connect 7 CC712 (All versions >= V2.0 < V2.1), SIMATIC Cloud Connect 7 CC712 (All versions < V2.1), SIMATIC Cloud Connect 7 CC716 (All versions >= V2.0 < V2.1), SIMATIC Cloud Connect 7 CC716 (All versions < V2.1). The affected device is vulnerable to a denial of service while parsing a random (non-JSON) MQTT payload. This could allow an attacker who can manipulate the communication between the MQTT broker and the affected device to cause a denial of service (DoS).

Weakness: CWE-544

Which versions are affected by CVE-2023-29105?

It affects 2 products.

Products include Siemens 6gk1411-1ac00 Firmware, Siemens 6gk1411-5ac00 Firmware.

How do I fix CVE-2023-29105?

No fix has been published for CVE-2023-29105 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-2023-29105 being exploited?

There is no known exploitation of CVE-2023-29105 in the wild and no public exploit code.

Sources

Also known as GHSA-fr6w-4xgh-4mgc.

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