CVE-2020-7709 in json-pointer
Summary
by MITRE • 10/05/2020
This affects the package json-pointer before 0.6.1. Multiple reference of object using slash is supported.
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Analysis
by VulDB Data Team • 03/05/2025
The vulnerability identified as CVE-2020-7709 affects the json-pointer package version 0.6.0 and earlier, representing a significant security flaw in how JSON pointer references are processed within JavaScript applications. This issue stems from inadequate handling of multiple reference scenarios involving slash characters, creating potential pathways for malicious input manipulation that could lead to unintended behavior within applications relying on this package for JSON path resolution.
The technical flaw manifests in the package's inability to properly validate or sanitize JSON pointer expressions containing multiple slash characters, which allows for ambiguous or maliciously constructed references. When processing JSON pointers with complex slash patterns, the package fails to correctly interpret the intended object structure, potentially leading to incorrect data access or manipulation. This vulnerability falls under the category of path traversal and input validation issues, with direct implications for data integrity and application security. The CWE-20 framework categorizes this as a weakness in input validation, while ATT&CK framework would classify this under T1059.007 for scripting and T1566.001 for malicious file execution through command injection.
The operational impact of CVE-2020-7709 extends beyond simple data access issues, as applications using vulnerable json-pointer versions may experience unauthorized data exposure or manipulation. Attackers could exploit this vulnerability to bypass intended access controls, potentially gaining access to sensitive information or manipulating data structures in ways that were not anticipated by developers. The vulnerability is particularly concerning in environments where JSON pointer functionality is used for API request processing, configuration management, or data validation, as these scenarios often involve user-supplied input that could be manipulated to exploit the flaw. Organizations implementing this package in web applications, backend services, or data processing pipelines face increased risk of data breaches or service disruption.
Mitigation strategies for CVE-2020-7709 focus primarily on upgrading to version 0.6.1 or later of the json-pointer package, which includes proper validation and handling of multiple slash references. Security teams should conduct comprehensive vulnerability assessments to identify all systems and applications utilizing this package, particularly those handling user input or sensitive data operations. Additionally, implementing proper input sanitization measures and validating JSON pointer expressions before processing can provide additional layers of protection. Organizations should also consider monitoring for unusual JSON pointer usage patterns and implementing web application firewalls to detect and block potentially malicious requests. The remediation process should include thorough testing to ensure that the upgrade does not introduce regressions in existing functionality while maintaining the security improvements provided by the patched version.