CVE-2018-11464 Denial of service in SINUMERIK 828D V4.7, SINUMERIK 840D sl V4.7, SINUMERIK 840D sl V4.8

What is CVE-2018-11464?

CVE-2018-11464 is a low-severity denial of service vulnerability in Siemens AG SINUMERIK 828D V4.7, SINUMERIK 840D sl V4.7, SINUMERIK 840D sl V4.8, published on 12 Dec 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 SINUMERIK 828D V4.7 (All versions < V4.7 SP6 HF1), SINUMERIK 840D sl V4.7 (All versions < V4.7 SP6 HF5), SINUMERIK 840D sl V4.8 (All versions < V4.8 SP3). The integrated VNC server on port 5900/tcp of the affected products could allow a remote attacker to cause a Denial-of-Service condition of the VNC server. Please note that this vulnerability is only exploitable if port 5900/tcp is manually opened in the firewall configuration of network port X130. The security vulnerability could be exploited by an attacker with network access to the affected devices and port. Successful exploitation requires no privileges and no user interaction. The vulnerability could allow an attacker to compromise availability of the VNC server. At the time of advisory publication no public exploitation of this security vulnerability was known.

Weakness: CWE-248

Which versions are affected by CVE-2018-11464?

It affects 2 products.

Products include Siemens Sinumerik 828d Firmware, Siemens Sinumerik 840d Sl Firmware.

How do I fix CVE-2018-11464?

No fix has been published for CVE-2018-11464 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-2018-11464 being exploited?

There is no known exploitation of CVE-2018-11464 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-6mj6-g5m3-f7hq.