The latest update for SINEMA Server fixes a vulnerability that could allow authenticated users with a low-privileged account to perform firmware updates (as well as other administrative operations) on connected devices. Therefore, Siemens recommends to update the affected products.
As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.
Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
SINEMA Server is a network management software designed by Siemens for use in Industrial Ethernet networks.
An additional classification has been performed using the CWE classification, a community-developed list of common software security weaknesses. This serves as a common language and as a baseline for weakness identification, mitigation, and prevention efforts. A detailed list of CWE classes can be found at: https://cwe.mitre.org/.
Incorrect session validation could allow an attacker with a valid session, with low privileges, to perform firmware updates and other administrative operations on connected devices.
The security vulnerability could be exploited by an attacker with network access to the affected system. An attacker must have access to a low privileged account in order to exploit the vulnerability. An attacker could use the vulnerability to compromise confidentiality, integrity, and availability of the affected system and underlying components.
At the time of advisory publication no public exploitation of this security vulnerability was known.