CVE-2022-40808 in d8s-dates
Summary
by MITRE • 09/19/2022
The d8s-dates for python, as distributed on PyPI, included a potential code-execution backdoor inserted by a third party. The backdoor is the democritus-hypothesis package. The affected version is 0.1.0
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Analysis
by VulDB Data Team • 10/20/2022
The vulnerability identified as CVE-2022-40808 represents a sophisticated supply chain attack targeting the Python package ecosystem through the d8s-dates library distributed via PyPI. This incident demonstrates the critical security risks associated with third-party dependencies and highlights how malicious actors can compromise software distribution channels to gain unauthorized access to systems. The vulnerability specifically affects version 0.1.0 of the d8s-dates package, which contained a backdoor that would execute arbitrary code when the package was installed or imported by unsuspecting developers.
The technical flaw manifests through the inclusion of a malicious dependency named democritus-hypothesis within the legitimate d8s-dates package. This backdoor operates by leveraging the trust model inherent in Python's package management system, where developers automatically install and import third-party libraries without thoroughly examining their contents. When a user installs or imports the compromised package, the malicious code within democritus-hypothesis executes, potentially allowing attackers to perform unauthorized operations on the victim's system. This type of vulnerability falls under CWE-494, which describes the creation of a malicious package that appears legitimate but contains hidden malicious code designed to execute arbitrary commands.
The operational impact of this vulnerability extends far beyond the immediate compromise of individual systems, as it represents a fundamental threat to the entire Python ecosystem and software supply chain security. Developers who unknowingly installed the compromised package could have their development environments, continuous integration pipelines, and ultimately production systems compromised. The backdoor could potentially exfiltrate sensitive data, provide persistent access to attacker-controlled systems, or serve as a foothold for further attacks within network environments. This vulnerability directly aligns with ATT&CK technique T1133, which covers external remote services, and T1059, which involves command and scripting interpreter, as the malicious code could execute commands and scripts on compromised systems.
Organizations and developers should implement comprehensive security measures to mitigate this vulnerability, including regular monitoring of package dependencies, implementing software composition analysis tools, and establishing secure software development practices. The recommended mitigations include immediately removing the compromised package from all systems, verifying the integrity of installed packages through checksum validation, and implementing automated security scanning in development and deployment pipelines. Additionally, developers should consider using virtual environments and package lock files to reduce the attack surface and maintain better control over their dependency versions. The incident underscores the importance of adopting security practices such as dependency verification, code signing, and maintaining up-to-date security awareness regarding the risks associated with third-party software components in modern software development workflows.