CVE-2023-51775 is a medium-severity vulnerability affecting the jose4j component prior to version 0.9.4. This vulnerability allows attackers to cause a denial of service (CPU consumption) by exploiting a large p2c (PBES2 Count) value. The CVSS score for this vulnerability is 6.5, indicating a moderate risk that organizations should not overlook.
The risk to organizations includes significant CPU consumption, which can lead to service unavailability. As the vulnerability has been classified with a medium severity level, it is imperative for affected users to take action. Organizations should prioritize patching immediately to mitigate this risk.
Currently, there are no known exploits or public proof-of-concept (PoC) available for this vulnerability. However, given the potential for denial of service, it is essential for security teams to monitor their environments closely.
Organizations using the jose4j component should schedule remediation as part of their patch management cycle and stay informed about updates from the vendor.
Vulnerability Details
The official description of CVE-2023-51775 states: 'The jose4j component before 0.9.4 for Java allows attackers to cause a denial of service (CPU consumption) via a large p2c (aka PBES2 Count) value.' This vulnerability has a CVSS 3.1 score of 6.5 with a base severity of medium. It is characterized by a network attack vector, low attack complexity, and low privileges required for exploitation.
The vulnerability impacts availability significantly while having no impact on confidentiality or integrity. The CWE classification for this vulnerability is CWE-400, which relates to the generation of excessive resource consumption.
Technical Analysis
The root cause of this vulnerability lies in the handling of the p2c value in the jose4j component. When an excessively large value is processed, it can lead to extreme CPU consumption, resulting in a denial of service condition. This issue primarily arises from insufficient input validation and constraints on the p2c parameter.
The attack vector is network-based, allowing remote attackers to exploit this vulnerability without needing physical access to the system. The complexity of the attack is low, as it does not require any specialized skills or resources to execute. Furthermore, the attacker needs low privileges to initiate the attack, and no user interaction is necessary.
In terms of impact, the vulnerability results in high availability impact, as systems may become unresponsive under load, leading to service outages. Organizations are encouraged to assess their use of the jose4j component and implement necessary controls to prevent exploitation.
Risk & Impact Analysis
Real-world deployment of the jose4j component, especially in critical systems, may expose organizations to significant risks if they remain unpatched. Given that this vulnerability enables denial of service, the blast radius could include any services operating on the affected systems, leading to disrupted business operations.
Organizations should assess their exposure and prioritize patching based on the CVSS score. The vulnerability's medium severity indicates that it should be addressed in the priority patch cycle. Monitoring for any unusual CPU spikes can assist in early detection of potential exploitation attempts.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects the jose4j component in all versions prior to 0.9.4. Organizations using the jose4j component should ensure they are running the latest version to mitigate this vulnerability.
Mitigation & Remediation
To mitigate this vulnerability, organizations should update to the latest version of the jose4j component. If a patch is not immediately available, consider implementing rate limiting or other network controls to mitigate the risk of denial of service. Regular monitoring of system performance can also help detect unusual CPU usage early.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor their logs for unusual CPU spikes that could indicate exploitation attempts. Behavioral anomalies in application performance could also signal a potential denial of service attack. Network signatures that correlate to the exploitation of the jose4j component should be established and monitored.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-51775 lies in its demonstration of how vulnerabilities in widely-used libraries can lead to denial of service conditions. This vulnerability highlights the need for security teams to conduct regular vulnerability assessments and maintain awareness of components in their technology stack.
Organizations are encouraged to adopt a proactive approach to security by implementing a vulnerability management program and integrating security practices into the software development lifecycle to mitigate similar risks.
For effective remediation, organizations should consider ongoing penetration testing practices that can uncover hidden vulnerabilities.
Additionally, leveraging API security testing can help organizations identify vulnerabilities within their applications that could be exploited.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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