The software supply chain has become increasingly complex, with numerous software components being used in modern applications. These components are often provided by third-party vendors, which can pose a significant security risk. In recent years, there have been several high-profile cyberattacks that have exploited vulnerabilities in software components, demonstrating the need for better transparency and security in the software supply chain. The Software Bill of Materials (SBOM) is an initiative designed to address these challenges by providing visibility into the components used within new software and improving the security of the software supply chain.
What is the purpose of SBOM?
The purpose of SBOM is to provide transparency and visibility into the components used within new software, and thereby improve the security of the software supply chain. By providing detailed information about the software components used in an application, including their version numbers, developers can better understand the dependencies in their application and address any vulnerabilities that may exist. This information can also help organizations identify potential supply chain risks and take steps to mitigate them before they become problematic.
How does SBOM work?
SBOM builds a complete list of all the packages and shared libraries used in each application, along with their version numbers. This information is usually provided in a standardized format that can be easily understood by both developers and security professionals. Once created, the SBOM can be shared with other organizations that may be using the same software components, providing a more comprehensive picture of the software supply chain.
The growth of open source projects
According to GitHub’s Octoverse 2022 report, there were 52 million new open source projects on GitHub in 2022, with developers across the platform making more than 413 million contributions to these projects throughout the year. This trend is expected to continue as more organizations recognize the benefits of using open source software components in their applications. However, the developers contributing to these projects are often coders, not security specialists, creating a significant challenge for organizations seeking to ensure the security of their software supply chain.
The role of developers in the software supply chain
Developers play a critical role in the software supply chain, as they select software components that will be used in an application and write the code that ties them together. However, many developers are not trained in security best practices, which makes it challenging for them to identify potential vulnerabilities in the software components they choose. This is why initiatives such as SBOM are so crucial – they offer a standardized way for developers to identify potential supply chain risks and take measures to address them.
The challenges of producing accurate SBOM documentation
While SBOM can provide valuable insights into the software supply chain, creating accurate documentation can be challenging. This is particularly true for solo developers and small groups of collaborators who may not have the resources to produce timely and accurate documentation. In these cases, it may be necessary to outsource the creation of an SBOM to a third-party provider, which can be costly and time-consuming.
Political challenges to SBOM implementation
The primary challenges to SBOM implementation may be more political than organizational. Many organizations are reluctant to share information about their software supply chain, fearing that it may be used against them in a cyberattack. Additionally, some software vendors may be hesitant to provide full transparency into their software components, as it may reveal potential vulnerabilities or weaknesses that could harm their reputation.
The limitations of transparency in supply chain security
While transparency can provide valuable insights into the software supply chain, it is not a silver bullet. Cyber attackers are always looking for new ways to exploit vulnerabilities, and even with full transparency, it may be difficult to identify and address all potential risks. This is why organizations need to adopt a multi-layered approach to supply chain security, including regular vulnerability assessments, threat modeling, and code review.
Uncertainty surrounds CISA’s SBOM implementation
The Cybersecurity and Infrastructure Security Agency (CISA) has started requiring certain federal agencies to provide SBOMs for their software components. However, there is still some uncertainty around how this initiative will be implemented and whether it will be successful in improving the security of the software supply chain. It is possible that other government agencies or industry sectors will follow suit, creating a demand for more standardized SBOM documentation across all organizations.
In conclusion, the Software Bill of Materials (SBOM) has the potential to improve the security of the software supply chain by providing transparency and visibility into the software components used in modern applications. While there are challenges to implementing SBOM, such as creating accurate documentation and overcoming political resistance to transparency, the benefits of this initiative are clear. By providing organizations with a more complete picture of their software supply chain, they can better identify potential risks and take steps to mitigate them before they become a problem. The success of SBOM will likely depend on broader adoption across industries and the development of best practices for creating and using this valuable tool.