CVE-2022-38792 in exotel-py
Summary
by MITRE • 08/28/2022
The exotel (aka exotel-py) package in PyPI as of 0.1.6 includes a code execution backdoor inserted by a third party.
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Analysis
by VulDB Data Team • 10/02/2022
The CVE-2022-38792 vulnerability represents a critical supply chain attack targeting the Python package ecosystem through the exotel-py package distributed via PyPI. This malicious package was discovered to contain a backdoor that enables remote code execution, fundamentally compromising the security posture of any system that installed the compromised version. The vulnerability specifically affects versions up to and including 0.1.6 of the exotel package, making it a widespread concern for developers and organizations relying on Python-based applications. The backdoor was strategically inserted by a third party with malicious intent, demonstrating the sophisticated nature of modern supply chain attacks that exploit the trust model inherent in package repositories.
The technical flaw within the exotel-py package manifests through the insertion of malicious code that executes arbitrary commands on the victim's system when the package is imported or used. This backdoor operates by leveraging the legitimate package interface while silently executing unauthorized operations, making detection extremely challenging for security monitoring systems. The vulnerability exploits the trust relationship between developers and package repositories, allowing attackers to gain persistent access to systems without requiring direct network infiltration or user interaction. The malicious code typically executes in the context of the Python interpreter, potentially allowing attackers to escalate privileges, access sensitive data, or establish further footholds within the network.
The operational impact of this vulnerability extends far beyond individual system compromise, as it affects the entire Python development ecosystem and introduces significant risks for organizations relying on third-party dependencies. When developers install the compromised package through standard pip commands, they unknowingly introduce a persistent backdoor that can be exploited by attackers to execute commands, exfiltrate data, or establish command and control channels. The vulnerability's presence in a widely-used package increases the attack surface significantly, as multiple organizations could be simultaneously compromised through a single malicious package installation. This type of attack directly violates the principle of least privilege and undermines the security assumptions that developers make when using trusted package repositories.
Organizations should immediately implement comprehensive mitigation strategies including immediate removal of the compromised package from all systems, updating package management policies to include security scanning, and implementing dependency verification mechanisms. The vulnerability aligns with ATT&CK technique T1133 (External Remote Services) and CWE-494 (Download of Code Without Integrity Check), highlighting the need for robust package integrity verification processes. Security teams should deploy automated scanning tools to identify potentially compromised packages, implement software composition analysis to track dependency origins, and establish secure software development practices that include code signing verification and repository integrity checks. Additionally, organizations must conduct thorough security audits of their existing codebases to identify potential exploitation and ensure that all development environments maintain updated security controls to prevent future supply chain compromises.