CVE-2019-13927 Denial of service in Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D with Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2
An attacker can cause a denial of service on the web server of Siemens Desigo PX automation controllers by sending a specially crafted HTTP message.
- 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-2019-13927?
CVE-2019-13927 is a medium-severity denial of service vulnerability in Siemens AG Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D with Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2, published on 12 Dec 2019. 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 Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D with Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2 (All firmware versions < V6.00.320), Desigo PX automation controllers PXC00-U, PXC64-U, PXC128-U with Desigo PX Web modules PXA30-W0, PXA30-W1, PXA30-W2 (All firmware versions < V6.00.320), Desigo PX automation controllers PXC22.1-E.D, PXC36-E.D, PXC36.1-E.D with activated web server (All firmware versions < V6.00.320). The device contains a vulnerability that could allow an attacker to cause a denial of service condition on the device's web server by sending a specially crafted HTTP message to the web server port (tcp/80). The security vulnerability could be exploited by an attacker with network access to an affected device. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the availability of the device's web service. While the device itself stays operational, the web server responds with HTTP status code 404 (Not found) to any further request. A reboot is required to recover the web interface. At the time of advisory publication no public exploitation of this security vulnerability was known.
Which versions are affected by CVE-2019-13927?
It affects 16 products.
Products include Siemens Pxa30-W0 Firmware, Siemens Pxa30-W1 Firmware, Siemens Pxa30-W2 Firmware, Siemens Pxa40-W0 Firmware, Siemens Pxa40-W1 Firmware, Siemens Pxa40-W2 Firmware and 10 more.
How do I fix CVE-2019-13927?
No fix has been published for CVE-2019-13927 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-2019-13927 being exploited?
There is no known exploitation of CVE-2019-13927 in the wild and no public exploit code.
Sources
Also known as GHSA-3phq-67rm-2hq8.