Executive Summary

The vulnerability in Apache::API::Password versions through v0.5.2 for Perl involves the generation of insecure random values for salts used in password hashing.

The methods _make_salt and _make_salt_bcrypt try to use Crypt::URandom and Bytes::Random::Secure modules to generate random bytes for salts. However, if these modules are not available, the methods fall back to using Perl's built-in rand function.

The rand function is not suitable for cryptographic purposes, meaning the salts generated this way are predictable and weak, which compromises the security of password hashes.

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Impact Analysis

This vulnerability can lead to weak password hashing because the salts used may be predictable if generated by Perl's rand function.

Predictable salts reduce the effectiveness of password hashing by making it easier for attackers to perform precomputed attacks such as rainbow table attacks or other forms of hash cracking.

As a result, user passwords may be more easily compromised, leading to unauthorized access and potential data breaches.

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Detection Guidance

This vulnerability arises when Apache::API::Password versions through v0.5.2 for Perl generate salts using Perl's built-in rand function instead of secure random sources. To detect this on your system, you should check if the Crypt::URandom or Bytes::Random::Secure Perl modules are installed and being used by the application.

You can verify the presence of Crypt::URandom by running the following command in your Perl environment:

• perl -MCrypt::URandom -e 'print "Crypt::URandom is installed\n";'

If this command fails, it indicates Crypt::URandom is not installed, and the application may fall back to using the insecure rand function.

Additionally, you can inspect the application code or logs to see if the _make_salt or _make_salt_bcrypt methods are loading these modules or falling back to rand.

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Mitigation Strategies

To mitigate this vulnerability, ensure that the Crypt::URandom or Bytes::Random::Secure Perl modules are installed and available to Apache::API::Password.

Installing Crypt::URandom (version 0.55 or later) provides a secure source of randomness by interfacing with native cryptographic libraries and system calls, preventing the fallback to the insecure rand function.

• Install Crypt::URandom using CPAN or cpanm: cpanm Crypt::URandom
• Verify that your Perl environment and application can load Crypt::URandom successfully.

If updating or installing these modules is not immediately possible, consider restricting access to the affected system and monitoring for suspicious activity related to password hashing.

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Compliance Impact

The vulnerability in Apache::API::Password versions through v0.5.2 for Perl involves generating insecure random values for salts used in password hashing. Since the salts may be generated using Perl's built-in rand function, which is unsuitable for cryptographic use, this weakens the security of password hashes.

Weak password hashing mechanisms can lead to easier compromise of stored passwords, increasing the risk of unauthorized access to personal or sensitive data.

Such security weaknesses can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require appropriate technical measures to protect personal and health information, including strong authentication and data protection practices.

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