CVE-2000-0445 in PGP
Summary
by MITRE
The pgpk command in PGP 5.x on Unix systems uses an insufficiently random data source for non-interactive key pair generation, which may produce predictable keys.
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Analysis
by VulDB Data Team • 04/21/2026
The vulnerability described in CVE-2000-0445 affects PGP 5.x implementations on Unix systems where the pgpk command fails to utilize adequate random number generation for creating key pairs in non-interactive environments. This weakness stems from the use of a pseudo-random number generator that does not provide sufficient entropy for cryptographic key generation, creating a significant security risk for users who rely on PGP for email encryption and digital signatures. The flaw specifically impacts automated key generation processes where the system cannot interact with users to gather additional random data through user input.
This vulnerability represents a critical weakness in cryptographic implementation that falls under the category of insufficient entropy in random number generation as classified by CWE-330. The inadequate randomness stems from the system's inability to properly seed the random number generator with sufficient unpredictable data, particularly when operating in non-interactive modes. When PGP generates keys without proper entropy sources, the resulting cryptographic keys become predictable and vulnerable to cryptanalysis attacks, potentially allowing adversaries to recover private keys through brute force or statistical analysis methods.
The operational impact of this vulnerability extends beyond simple key generation failures and represents a fundamental flaw in the cryptographic security model of PGP 5.x implementations. Attackers who can predict the random data used in key generation can potentially reconstruct private keys from public keys, undermining the entire foundation of public key cryptography. This vulnerability directly affects the confidentiality and integrity of encrypted communications, as compromised keys allow unauthorized parties to decrypt sensitive information or forge digital signatures. The risk is particularly severe in environments where automated key generation processes are common, such as server deployments or batch processing systems.
The security implications of this vulnerability align with techniques described in the MITRE ATT&CK framework under the T1583.001 tactic for obtaining capabilities, specifically targeting the creation of cryptographic keys through weak randomness sources. Organizations using affected PGP implementations face significant risk of data breaches and compromised communications, as the predictability of keys can lead to unauthorized access to encrypted data, man-in-the-middle attacks, and the potential for identity spoofing. The vulnerability demonstrates poor adherence to cryptographic best practices and highlights the importance of proper entropy collection in security-sensitive applications.
Mitigation strategies for this vulnerability require immediate replacement of affected PGP 5.x implementations with versions that properly implement cryptographic random number generation. System administrators should ensure that all key generation processes utilize proper entropy sources including hardware random number generators, system-level randomness, and adequate user interaction where possible. Organizations must also implement monitoring procedures to detect and remediate any automated key generation processes that may be affected by this vulnerability. The recommended solution involves upgrading to PGP versions that properly implement the cryptographic random number generation standards and ensuring that all system components provide sufficient entropy for key generation processes.