cryo
Corregido en
0.0.7
CVE-2018-3784 is a critical code injection vulnerability affecting the cryo Node.js module. This vulnerability stems from an insecure implementation of deserialization, allowing attackers to inject and execute arbitrary code. Versions of cryo prior to 0.0.6 are vulnerable. Mitigation involves upgrading to a patched version or implementing robust input validation to prevent malicious data from being deserialized.
The impact of CVE-2018-3784 is severe. An attacker can leverage this vulnerability to execute arbitrary code on the server hosting the vulnerable Node.js application. This could lead to complete system compromise, including data exfiltration, malware installation, and denial of service. The ability to inject arbitrary code bypasses standard security controls, making it a high-risk vulnerability. The provided proof-of-concept demonstrates the ease of exploitation, highlighting the potential for widespread attacks targeting applications using the cryo module.
CVE-2018-3784 was publicly disclosed on August 21, 2018. A proof-of-concept (PoC) is available, demonstrating the vulnerability's ease of exploitation. The vulnerability's severity is underscored by its CRITICAL CVSS score. There is no indication of active exploitation campaigns or inclusion in the CISA KEV catalog at this time, but the availability of a PoC increases the risk of exploitation.
Applications built with Node.js that utilize the cryo module for data serialization are at risk. This includes applications handling external data, such as APIs and web services. Specifically, systems relying on cryo for data persistence or inter-process communication are particularly vulnerable.
• nodejs / server:
ps aux | grep cryo• nodejs / server:
find / -name "node_modules/cryo" 2>/dev/null• nodejs / supply-chain: Examine package.json files for dependencies on cryo versions <= 0.0.6. Use npm ls cryo to identify vulnerable projects.
• generic web: Monitor Node.js application logs for unusual activity or errors related to deserialization.
disclosure
Estado del Exploit
EPSS
0.39% (60% percentil)
Vector CVSS
The primary mitigation for CVE-2018-3784 is to upgrade to a patched version of the cryo module. Unfortunately, no specific fixed version is provided in the input. If upgrading is not immediately feasible, implement strict input validation on any data being deserialized by cryo. This involves carefully sanitizing and validating the data to ensure it does not contain malicious code. Consider using a Web Application Firewall (WAF) to filter potentially malicious requests. Review and restrict the permissions of the Node.js process running the application to limit the potential damage from a successful exploit. After upgrading, confirm the vulnerability is resolved by attempting to deserialize a known malicious payload and verifying that it is rejected.
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CVE-2018-3784 is a critical code injection vulnerability in the cryo Node.js module, allowing attackers to execute arbitrary code due to insecure deserialization.
You are affected if your Node.js application uses cryo version 0.0.6 or earlier. Carefully review your project dependencies.
Upgrade to a patched version of cryo. If upgrading is not possible, implement strict input validation on data being deserialized.
While there's no confirmed active exploitation, the availability of a public proof-of-concept increases the risk of exploitation.
Refer to the original CVE entry for links to relevant resources and advisories: https://nvd.nist.gov/vuln/detail/CVE-2018-3784
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