CVE-2020-15366 Explained : Impact and Mitigation

An issue was discovered in ajv.validate() in Ajv (aka Another JSON Schema Validator) 6.12.2. This vulnerability could allow the execution of arbitrary code through prototype pollution.

Understanding CVE-2020-15366

This CVE identifies a security flaw in Ajv 6.12.2 that could lead to code execution through a carefully crafted JSON schema.

What is CVE-2020-15366?

CVE-2020-15366 is a vulnerability in Ajv (Another JSON Schema Validator) version 6.12.2 that enables attackers to execute arbitrary code via prototype pollution. It is crucial to note that using untrusted schemas is discouraged to mitigate this risk.

The Impact of CVE-2020-15366

The exploitation of this vulnerability could result in the execution of unauthorized code, posing a significant security risk to affected systems.

Technical Details of CVE-2020-15366

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in ajv.validate() in Ajv 6.12.2 allows for the execution of arbitrary code through a carefully crafted JSON schema, exploiting prototype pollution.

Affected Systems and Versions

Affected Version: 6.12.2
Systems using Ajv 6.12.2 are vulnerable to this exploit.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a malicious JSON schema that manipulates prototypes, leading to code execution.

Mitigation and Prevention

Protecting systems from CVE-2020-15366 requires immediate action and long-term security practices.

Immediate Steps to Take

Update Ajv to version 6.12.3 to patch the vulnerability.
Avoid using untrusted schemas in Ajv to prevent potential code execution.

Long-Term Security Practices

Regularly update software and libraries to the latest secure versions.
Implement input validation and sanitization to mitigate similar vulnerabilities.
Conduct security audits to identify and address potential security risks.
Educate developers on secure coding practices to prevent future exploits.

Patching and Updates

Ensure all systems using Ajv are updated to version 6.12.3 to eliminate the vulnerability and enhance security measures.