An Uncontrolled Search Path Element vulnerability in B&R Industrial Automation Scene Viewer, B&R Industrial Automation Automation Runtime, B&R Industrial Automation mapp Vision, B&R Industrial Automation mapp View, B&R Industrial Automation mapp Cockpit, B&R Industrial Automation mapp Safety, B&R Industrial Automation VC4, B&R Industrial Automation APROL, B&R Industrial Automation CAN Driver, B&R Industrial Automation CAN Driver CC770, B&R Industrial Automation CAN Driver SJA1000, B&R Industrial Automation Tou0ch Lock, B&R Industrial Automation B&R Single-Touch Driver, B&R Industrial Automation Serial User Mode Touch Driver, B&R Industrial Automation Windows Settings Changer (LTSC), B&R Industrial Automation Windows Settings Changer (2019 LTSC), B&R Industrial Automation Windows 10 Recovery Solution, B&R Industrial Automation ADI driver universal, B&R Industrial Automation ADI Development Kit, B&R Industrial Automation ADI .NET SDK, B&R Industrial Automation SRAM driver, B&R Industrial Automation HMI Service Center, B&R Industrial Automation HMI Service Center Maintenance, B&R Industrial Automation Windows 10 IoT Enterprise 2019 LTSC, B&R Industrial Automation KCF Editor could allow an authenticated local attacker to execute malicious code by placing specially crafted files in the loading search path..This issue affects Scene Viewer: before 4.4.0; Automation Runtime: before J4.93; mapp Vision: before 5.26.1; mapp View: before 5.24.2; mapp Cockpit: before 5.24.2; mapp Safety: before 5.24.2; VC4: before 4.73.2; APROL: before 4.4-01; CAN Driver: before 1.1.0; CAN Driver CC770: before 3.3.0; CAN Driver SJA1000: before 1.3.0; Tou0ch Lock: before 2.1.0; B&R Single-Touch Driver: before 2.0.0; Serial User Mode Touch Driver: before 1.7.1; Windows Settings Changer (LTSC): before 3.2.0; Windows Settings Changer (2019 LTSC): before 2.2.0; Windows 10 Recovery Solution: before 3.2.0; ADI driver universal: before 3.2.0; ADI Development Kit: before 5.5.0; ADI .NET SDK: before 4.1.0; SRAM driver: before 1.2.0; HMI Service Center: before 3.1.0; HMI Service Center Maintenance: before 2.1.0; Windows 10 IoT Enterprise 2019 LTSC: through 1.1; KCF Editor: before 1.1.0.
The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.
Although this weakness can occur with any type of resource, it is frequently introduced when a product uses a directory search path to find executables or code libraries, but the path contains a directory that can be modified by an attacker, such as “/tmp” or the current working directory. In Windows-based systems, when the LoadLibrary or LoadLibraryEx function is called with a DLL name that does not contain a fully qualified path, the function follows a search order that includes two path elements that might be uncontrolled:
In some cases, the attack can be conducted remotely, such as when SMB or WebDAV network shares are used. One or more locations in that path could include the Windows drive root or its subdirectories. This often exists in Linux-based code assuming the controlled nature of the root directory (/) or its subdirectories (/etc, etc), or a code that recursively accesses the parent directory. In Windows, the drive root and some of its subdirectories have weak permissions by default, which makes them uncontrolled. In some Unix-based systems, a PATH might be created that contains an empty element, e.g. by splicing an empty variable into the PATH. This empty element can be interpreted as equivalent to the current working directory, which might be an untrusted search element. In software package management frameworks (e.g., npm, RubyGems, or PyPi), the framework may identify dependencies on third-party libraries or other packages, then consult a repository that contains the desired package. The framework may search a public repository before a private repository. This could be exploited by attackers by placing a malicious package in the public repository that has the same name as a package from the private repository. The search path might not be directly under control of the developer relying on the framework, but this search order effectively contains an untrusted element.