CVE-2002-2204 in RPM Package Manager
Summary
by MITRE
The default --checksig setting in RPM Package Manager 4.0.4 checks that a package s signature is valid without listing who signed it, which can allow remote attackers to make it appear that a malicious package comes from a trusted source.
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Analysis
by VulDB Data Team • 07/12/2024
The vulnerability described in CVE-2002-2204 resides within the RPM Package Manager version 4.0.4 where the default --checksig setting implements a security flaw that undermines the integrity verification process. This issue specifically affects the signature validation mechanism by allowing packages to be accepted as legitimate if they contain a valid signature regardless of the signer's identity. The flaw operates at the core of package management security where trust verification is paramount for system integrity and security posture.
The technical implementation of this vulnerability stems from the RPM package manager's approach to signature checking where it validates cryptographic signatures without enforcing proper identity verification. When the --checksig option is used in its default configuration, the system accepts packages that possess valid signatures but fails to cross-reference these signatures against trusted key sources. This creates a scenario where an attacker could generate a package with a valid signature using a forged key that appears to originate from a legitimate source, thereby bypassing the intended security controls.
From an operational impact perspective, this vulnerability enables sophisticated social engineering attacks where malicious actors can craft packages that appear to come from trusted repositories or administrators. The flaw essentially allows attackers to exploit the trust model inherent in package management systems, potentially leading to privilege escalation, unauthorized code execution, or complete system compromise. The vulnerability is particularly dangerous because it operates silently without alerting administrators to the presence of malicious packages that have been crafted to appear legitimate.
This vulnerability aligns with CWE-310, which addresses cryptographic weaknesses in signature validation processes, and represents a critical failure in the principle of least privilege within package management security. The issue also maps to ATT&CK technique T1195.002 which covers 'Supply Chain Compromise: Compromise Software Dependencies and Development Tools' where attackers manipulate package integrity verification mechanisms to inject malicious code into trusted software distribution channels.
Mitigation strategies for CVE-2002-2204 require administrators to implement explicit signature verification policies that enforce identity checking rather than relying on the default behavior. The recommended approach includes configuring RPM to require specific trusted keys before accepting packages, implementing proper key management practices, and establishing explicit signature validation procedures. System administrators should also consider upgrading to newer RPM versions where this behavior has been corrected and enhanced security controls have been implemented. Additionally, organizations should deploy comprehensive package integrity monitoring solutions that can detect anomalous signature patterns and maintain detailed audit trails of all package installations and updates.