Timing Attack Vulnerability in Crypt::Password Perl Module

Executive Summary

This vulnerability affects the Perl module Crypt::Password versions up to 0.28. It involves a timing attack due to the use of the eq operator in the check_password method. This allows attackers to measure response times to guess the correct password hash.

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Detection Guidance

This vulnerability is specific to Perl's Crypt::Password module and cannot be detected via general network or system commands. Review Perl applications using Crypt::Password for timing discrepancies in password checks.

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Impact Analysis

If you use Crypt::Password for password verification, an attacker could exploit timing differences to guess valid passwords. This could lead to unauthorized access to systems or data protected by this module.

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Compliance Impact

This vulnerability primarily affects password security by enabling timing attacks due to the use of the eq operator in the check_password method. While it does not directly impact compliance with standards like GDPR or HIPAA, weak password security could lead to unauthorized access, which may violate data protection requirements under these regulations if user credentials are compromised.

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Mitigation Strategies

Upgrade Crypt::Password to a version that replaces the eq operator with a constant-time comparison method. If no patched version exists, consider switching to a different Perl password hashing module.

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