ONNX Viewer

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Top issues

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TH17115

Detected presence of files containing URLs that use non-standard ports.

hunting

Problem

Uniform Resource Locators (URLs) are structured addresses that point to locations and assets on the internet. URLs allow software developers to build complex applications that exchange data with servers that can be hosted in multiple geographical regions. URLs can commonly be found embedded in documentation, configuration files, source code and compiled binaries. A port number is associated with a network address of a host, such as an IP address, and the type of network protocol used for communication. Within URLs, the ports are optional. Ports can be specified in a URL immediately following the domain name. Each network protocol, or schema, has a set of standard ports on which the service operates. This issue is raised when a mismatch between a network protocol and its expected port number is detected. While the presence of non-standard ports does not imply malicious intent, all of their uses in a software package should be documented and approved.

Prevalence in Visual Studio Code community

No prevalence information at this time

Next steps

Investigate reported detections.

If the software should not include these network references, investigate your build and release environment for software supply chain compromise.

You should delay the software release until the investigation is completed, or until the issue is risk accepted.

Consider changing the port to one that is standard for the networking protocol.

TH16102

Detected presence of files containing bidirectional Unicode control characters.

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Problem

Unicode is a text encoding standard designed to support the use of text written in all of the major languages and writing systems. While most languages are written from left to right, some are written in alternative directions. To accommodate encoding text written in such languages, the Unicode standard includes a number of special characters that allow the text direction to be specified. However, changing text direction can have adverse effects on how the encoded text is displayed and interpreted. For this reason, bidirectional Unicode control characters are commonly abused by malicious actors as a means of bypassing security solutions and avoiding detection. While presence of special Unicode characters does not imply malicious intent, all of its uses in a software package should be documented and approved. One example of acceptable use for these special characters is in script files that parse, validate, and transform Unicode-encoded text.

Prevalence in Visual Studio Code community

No prevalence information at this time

Next steps

Investigate reported detections as indicators of software tampering.

Consult Mitre ATT&CK documentation: T1036.002 - Masquerading: Right-to-Left Override.

Consult publicly available materials on the Trojan Source vulnerability.

Top behaviors

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Might contain potentially obfuscated code or data.

anomaly