CVE-2024-48924 is a high-severity vulnerability identified in the MessagePack-CSharp library. This vulnerability allows attackers to exploit the library's deserialization process, particularly when handling messagepack data from untrusted sources. The risk manifests as a denial of service (DoS) condition, where attackers can send specially crafted data designed to produce hash collisions. This results in significant CPU consumption that is disproportionate to the volume of data being processed.
The CVSS score for this vulnerability is 8.7, indicating a high level of severity. This underscores the necessity for organizations to address this vulnerability promptly to prevent potential service disruptions. Given the nature of the attack vector, which is network-based, the likelihood of exploitation increases, making it critical for organizations to take action.
Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability. The exploitability of the vulnerability is high, and while there is currently no known public exploit, the implications of unaddressed vulnerabilities can be severe.
In light of these factors, it is vital for organizations to remain vigilant in monitoring their use of the MessagePack-CSharp library and to implement corrective measures as soon as possible.
Vulnerability Details
The vulnerability arises when the MessagePack-CSharp library deserializes data from sources that are not trusted. Attackers can exploit this behavior by sending data that causes hash collisions, leading to a denial of service through excessive CPU usage. The vulnerability is classified under CWE-328, indicating a flaw in the handling of hash collisions. The library has undergone previous advisories related to similar issues, indicating the need for robust handling and configurations when processing untrusted data.
Technical Analysis
The root cause of this vulnerability is the library's deserialization process, which is susceptible to crafted inputs that manipulate its hash functions. The attack vector is primarily network-based, and the attack complexity is considered low, as attackers do not require any special privileges or user interaction to execute the exploit. The impact on availability is classified as high, indicating that successful exploitation could lead to significant service outages.
Risk & Impact Analysis
Risk to organizations includes potential denial of service scenarios, which could severely disrupt operations. The vulnerability's nature allows for broad exploitation across affected systems that utilize the library for deserialization. Given the high CVSS score of 8.7, organizations must act swiftly to address this vulnerability in their systems. The urgency for remediation is elevated due to the potential for widespread impact and the simplicity of the attack.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected. Users of the MessagePack-CSharp library are advised to upgrade to a patched version.
Mitigation & Remediation
To mitigate the risk associated with this vulnerability, organizations should upgrade to a version of the MessagePack-CSharp library where a fix is available. If upgrading is not feasible, applying a manual workaround is recommended. This involves declaring a class that derives from `MessagePackSecurity` and overriding the `GetHashCollisionResistantEqualityComparer<T>` method to implement a custom hash function. Organizations should ensure that their applications are configured to handle untrusted data securely.
For additional guidance on security practices when handling untrusted data with MessagePack, organizations can refer to the following resources: penetration testing to validate configuration.
Detection Guidance
Organizations should monitor for unusual CPU usage patterns and review logs for any errors related to deserialization of messagepack data. Behavioral anomalies during data deserialization processes should also be investigated to identify potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-48924 highlights the ongoing challenges organizations face when processing untrusted data. This vulnerability represents a pattern of security weaknesses that can lead to denial of service scenarios, emphasizing the need for secure coding practices and thorough testing of libraries. Security teams should use this incident as a strategic takeaway, reinforcing the importance of vigilance when integrating third-party libraries and ensuring they are regularly updated.
For further information on secure integration practices, organizations may find value in exploring the following resources: penetration testing methodology and vulnerability management program design can provide valuable insights into maintaining security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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