CVE-2024-24783 represents a medium-severity vulnerability that affects crypto/tls clients and servers. This vulnerability allows for a panic to occur when verifying a certificate chain containing a certificate with an unknown public key algorithm. The panic can disrupt service and lead to potential denial of service conditions.
The CVSS score for this vulnerability is 5.9, indicating a moderate risk level that organizations should not overlook. The vulnerability is especially concerning for systems that have configured ClientAuth to either VerifyClientCertIfGiven or RequireAndVerifyClientCert, as these settings enforce client certificate verification.
Risk to organizations includes potential service disruptions and the inability to establish secure connections with clients that present certificates using unknown public key algorithms. Given the nature of this vulnerability, organizations should address it in their priority patch cycle.
Currently, there are no known exploits or public proofs of concept available for this vulnerability, which may provide a temporary window for remediation before potential exploitation is discovered.
Vulnerability Details
The vulnerability is described as follows: Verifying a certificate chain that contains a certificate with an unknown public key algorithm will cause Certificate.Verify to panic. This affects all crypto/tls clients and servers that set Config.ClientAuth to VerifyClientCertIfGiven or RequireAndVerifyClientCert. The default behavior is for TLS servers to not verify client certificates.
The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N, indicating that it has a medium severity level, with a base score of 5.9. The attack vector is network-based, and while it has a high attack complexity, no privileges are required for exploitation.
Technical Analysis
The root cause of this vulnerability lies in the handling of certificates that utilize unknown public key algorithms. When the system attempts to verify such certificates, it results in a panic, effectively causing any ongoing operations that rely on certificate verification to fail.
The attack vector is classified as network-based, meaning that an attacker could potentially exploit this vulnerability remotely. The attack complexity is high, indicating that there are multiple conditions that must be met for successful exploitation. Furthermore, no privileges are required to exploit this vulnerability, and user interaction is not necessary.
Risk & Impact Analysis
Real-world deployment risk includes the potential for service disruptions in crypto/tls clients and servers. The panic caused by this vulnerability could lead to denial of service conditions, which can significantly impact organizations that rely on secure communications. It is crucial for organizations to understand that the blast radius of this vulnerability can affect all clients and servers configured to verify client certificates.
Organizations should assess the urgency of addressing this vulnerability based on its CVSS score of 5.9 and the potential for exploitation in their specific environments. Given that it is classified as medium severity, organizations should address it in their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Currently, there are no specific affected versions listed for this vulnerability. Organizations should assume that all versions are affected until a vendor patch is provided.
Mitigation & Remediation
Organizations should monitor for updates regarding this vulnerability and apply patches as soon as they are available. In the interim, disabling client certificate verification for connections that do not require it may mitigate the risk.
For further security enhancements, organizations can refer to best practices outlined in our penetration testing methodology to improve their security posture.
Detection Guidance
Organizations should monitor logs for any anomalies related to certificate verification processes. Additionally, establishing alerts for unusual behaviors in crypto/tls interactions can help identify potential exploitation attempts.
AppSecure Threat Intelligence Insight
This vulnerability underscores the importance of robust certificate validation processes in cryptographic implementations. Organizations should regularly review their security configurations and ensure they are aligned with best practices.
For more insights into securing your applications, organizations can explore our application security assessment services.
Additionally, understanding the trends in vulnerabilities can help organizations stay ahead. Our vulnerability management program design can assist organizations in mitigating risks effectively.
Finally, organizations should consider engaging in red teaming exercises to identify vulnerabilities before they can 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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