Desigo PXC00-E.D Web Server HTTP Message external control of assumed-immutable web parameter

Summaryinfo

A vulnerability has been found in Desigo PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D, PXC00-U, PXC64-U, PXC128-U, PXA30-W0, PXA30-W1, PXA30-W2, PXC22.1-E.D, PXC36-E.D and PXC36.1-E.D and classified as problematic. Affected by this vulnerability is an unknown functionality of the component Web Server. The manipulation as part of HTTP Message leads to external control of assumed-immutable web parameter. This vulnerability is traded as CVE-2019-13927. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Desigo PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D, PXC00-U, PXC64-U, PXC128-U, PXA30-W0, PXA30-W1, PXA30-W2, PXC22.1-E.D, PXC36-E.D and PXC36.1-E.D. It has been rated as problematic. This issue affects an unknown part of the component Web Server. The manipulation as part of a HTTP Message leads to a external control of assumed-immutable web parameter vulnerability. Using CWE to declare the problem leads to CWE-472. The web application does not sufficiently verify inputs that are assumed to be immutable but are actually externally controllable, such as hidden form fields. Impacted is availability. The summary by CVE is:

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.

The weakness was shared 12/12/2019. The identification of this vulnerability is CVE-2019-13927 since 07/18/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Desigo

Name

• PXA30-W0
• PXA30-W1
• PXA30-W2
• PXC00-E.D
• PXC00-U
• PXC22.1-E.D
• PXC36-E.D
• PXC36.1-E.D
• PXC50-E.D
• PXC64-U
• PXC100-E.D
• PXC128-U
• PXC200-E.D

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