CVE-2019-13927: 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

Vulnerability summary

CVE-2019-13927 is a medium (CVSS 5.3) 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. EPSS estimates a 1.68% chance of exploitation in the next 30 days, higher than 76.6% of scored vulnerabilities.

Timeline

1. 12-12-2019
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

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.

• CWE-472External Control of Assumed-Immutable Web ParameterThe web application does not sufficiently verify inputs that are assumed to be immutable but are actually externally controllable, such as hidden form fields.
• CWE-668Exposure of Resource to Wrong SphereThe product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.