CVE-2022-42044 in d8s-asns
Summary
by MITRE • 10/12/2022
The d8s-asns package for Python, as distributed on PyPI, included a potential code-execution backdoor inserted by a third party. The backdoor is the democritus-html package. The affected version is 0.1.0.
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Analysis
by VulDB Data Team • 05/20/2025
The d8s-asns package version 0.1.0 distributed through the Python Package Index (PyPI) contained a sophisticated supply chain attack that exploited the trust model inherent in Python's package ecosystem. This vulnerability represents a critical compromise where malicious actors inserted a backdoor through the democritus-html package, demonstrating how attackers can leverage legitimate package distribution channels to gain unauthorized access to systems. The attack occurred at the package level rather than at the code execution level, making it particularly insidious as users would have no indication that their dependency installations contained malicious components. The vulnerability exploited the fundamental trust developers place in package repositories and the automated installation processes that pull dependencies without thorough security vetting.
The technical flaw manifested through a carefully crafted malicious package that was designed to appear legitimate within the Python ecosystem. The democritus-html package served as the delivery mechanism for the backdoor code, which was embedded within the dependency chain of the d8s-asns package. This approach allowed attackers to bypass traditional security measures by operating within the accepted package distribution model. The vulnerability specifically targeted the installation process where Python's package manager would automatically resolve and install dependencies, including the malicious democritus-html component. The attack vector relied on the assumption that packages available on PyPI were trustworthy, which is a core principle of the Python package management system but became a security weakness in this instance.
The operational impact of CVE-2022-42044 extends far beyond simple code execution, as it represents a fundamental breach of trust in software supply chains. Organizations that installed the affected d8s-asns package version 0.1.0 would have unknowingly introduced backdoor functionality into their systems, potentially allowing attackers to execute arbitrary commands, exfiltrate data, or establish persistent access. The vulnerability affected any system where the package was installed, regardless of the specific use case or environment, making it particularly dangerous in production environments. The impact was amplified by the fact that this was a widely distributed package that could have been used across multiple applications and organizations, creating a potential attack surface that extended far beyond the initial compromise. Security teams would have faced significant challenges in detecting this compromise since the malicious code was designed to appear legitimate and operate within normal system behavior patterns.
Mitigation strategies for this vulnerability required immediate action including removal of the affected packages from all systems, updating package management configurations to implement additional verification steps, and conducting thorough security audits of installed dependencies. Organizations needed to implement package integrity verification mechanisms and consider using trusted package sources with enhanced security controls. The incident highlighted the necessity of implementing software composition analysis tools and dependency verification processes to detect similar supply chain attacks. Security practices should include regular monitoring of package repositories for suspicious activity and establishing policies for manual verification of critical dependencies. This vulnerability aligns with CWE-494 in the Common Weakness Enumeration which addresses the improper validation of dangerous data, and relates to ATT&CK technique T1195.002 for supplying chain compromise, emphasizing the critical need for supply chain security measures in modern software development environments.