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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. One or more embedded URLs were discovered to link to raw files hosted on GitHub. Attackers often abuse popular web services to host malicious payloads. Since code-sharing services URLs are typically allowed by security solutions, using them for payload delivery increases the odds that the malicious code will reach the user. While the presence of code-sharing service locations does not imply malicious intent, all of their uses in a software package should be documented and approved. An increasing number of software supply chain attacks in the open source space leverages the GitHub service to deliver malicious payloads.

Problem

Software developers use programming and design knowledge to build reusable software components. Software components are the basic building blocks for modern applications. Software consumed by an enterprise consists of hundreds, and sometimes even thousands of open source components. Each of these components can have dozens, or even hundreds, of its own dependencies. When building applications, software developers download and install components from public repositories. For components to work properly, all of their dependencies also need to be installed. Some package repositories, like Node Package Manager (NPM), allow components to declare dependencies that are hosted remotely. Such dependencies are automatically downloaded from a specified location during software component installation. Since remotely hosted dependencies are not immutable, that enables a threat actor to change the dependency contents even after a component was published and vetted by security solutions. It is uncommon to find open source components that use remotely hosted dependencies residing outside the official project source code repository.

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.

Problem

Software developers use programming and design knowledge to build reusable software components. Software components are the basic building blocks for modern applications. Software consumed by an enterprise consists of hundreds, and sometimes even thousands of open source components. Each of these components can have dozens, or even hundreds, of its own dependencies. When building applications, software developers download and install components from public repositories. For components to work properly, all of their dependencies also need to be installed. Some package repositories, like Node Package Manager (NPM), allow components to declare dependencies that are hosted remotely. Such dependencies are automatically downloaded from a specified location during software component installation. Since remotely hosted dependencies are not immutable, that enables a threat actor to change the dependency contents even after a component was published and vetted by security solutions. It is uncommon to find open source components that use remotely hosted source dependencies.

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.