The recently identified vulnerability CVE-2023-46233 affects the crypto-js library, a widely used JavaScript library for cryptographic standards. This vulnerability allows crypto-js PBKDF2 to be significantly weaker than specified in 1993. Specifically, prior to version 4.2.0, this implementation is 1,000 times weaker than originally defined and at least 1,300,000 times weaker than the current industry standard. The weakness arises from the library's default use of SHA1, a cryptographic hash algorithm deemed insecure since at least 2005, and a default iteration count of just 1,000, which fails to provide adequate security against modern threats.
The PBKDF2 algorithm’s effectiveness relies heavily on the iteration count as a countermeasure against preimage and collision attacks. If this algorithm is employed for password protection or generating signatures, the potential impact is substantial. Security professionals should note that version 4.2.0 addresses this issue, and organizations are urged to upgrade without delay.
As a temporary workaround, it is advisable to configure crypto-js to use SHA256 with at least 250,000 iterations to enhance security until an upgrade can be completed. The urgency for remediation is high given the potential risks associated with exploiting this vulnerability.
Organizations should prioritize patching immediately to protect sensitive data and maintain the integrity of cryptographic operations.
Vulnerability Details
The official CVE description indicates that the vulnerability in crypto-js PBKDF2 is due to its default configuration. The CVSS score of 9.1 categorizes this as a critical vulnerability, indicating an urgent need for remediation. The affected product is crypto-js, with the vendor being crypto-js_project. The vulnerability was published on October 25, 2023, and is classified under several CWE identifiers, including CWE-328 and CWE-327.
Technical Analysis
The root cause of this vulnerability is the decision to use SHA1 as the default hash function, combined with an insufficient iteration count of 1,000. Attackers may leverage this weakness by executing dictionary or brute-force attacks against hashed passwords or signatures generated using PBKDF2. The attack vector is network-based, and the complexity of the attack is rated as low, given that no special privileges or user interaction is required for exploitation. The impacts on confidentiality and integrity are high, while availability remains unaffected.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2023-46233 is significant. Given that many applications use crypto-js for cryptographic operations, the potential blast radius for this vulnerability is extensive. If exploited, attackers could gain unauthorized access to sensitive data or compromise system integrity. Organizations must assess their usage of the crypto-js library and address this vulnerability in their security posture. The critical CVSS score and the presence of known weaknesses underline the urgency of immediate action.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of crypto-js prior to 4.2.0 are affected by this vulnerability. Organizations using this library must upgrade to the latest version to mitigate risks associated with this flaw.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade to crypto-js version 4.2.0 or later. If immediate upgrading is not possible, configure crypto-js to use SHA256 with at least 250,000 iterations as a temporary workaround. This configuration change can significantly improve the strength of the PBKDF2 implementation until the library can be fully updated.Organizations should consider penetration testing to validate the effectiveness of these changes and identify any additional weaknesses in their security posture.
Detection Guidance
Monitoring for the use of crypto-js and logging any configurations or changes made to its cryptographic settings is crucial. Organizations should also be aware of behavioral anomalies that might indicate attempts to exploit this vulnerability. Regular reviews of system logs for unusual access patterns can help detect potential breaches.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-46233 highlights the critical importance of implementing strong cryptographic standards in software development. As the threat landscape evolves, weaknesses in widely used libraries like crypto-js can have far-reaching consequences. Security teams should take this opportunity to review their cryptographic practices and consider adopting more robust frameworks. For further insights on enhancing security measures, organizations may explore our penetration testing methodology and vulnerability management program to strengthen their defenses.
Additionally, organizations should stay informed about emerging threats and trends in cryptography to better prepare for the challenges ahead. Exploring resources such as our API security best practices can provide valuable insights into securing cryptographic implementations.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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