CVE-2020-7751: Prototype Pollution vulnerability in pathval

What is CVE-2020-7751 About?

This is a prototype pollution vulnerability affecting all versions of the 'pathval' package under 1.1.1. It allows an attacker to inject arbitrary properties into JavaScript objects, which can lead to various security bypasses or remote code execution. Exploitation is generally easy given the nature of prototype pollution.

Affected Software

pathval <1.1.1

Technical Details

The vulnerability lies within the 'pathval' package where an attacker can manipulate an object's prototype. By injecting malicious properties into the prototype of a base JavaScript object, an attacker can impact all objects inheriting from that prototype. This can lead to unexpected behavior, property overwriting, or even execution of arbitrary code if application logic relies on manipulated properties or methods derived from the prototype chain.

What is the Impact of CVE-2020-7751?

Successful exploitation may allow attackers to alter application logic, bypass security controls, perform denial of service, or achieve remote code execution depending on the application's implementation and how it processes objects.

What is the Exploitability of CVE-2020-7751?

Exploitation of this prototype pollution vulnerability typically requires an attacker to provide specially crafted input that can traverse or modify object prototypes. The complexity is generally low, as it often involves providing dot-notation paths in data that the application processes. No authentication is usually required at the point of vulnerability, but the attacker needs to be able to supply input that is processed by the vulnerable package. Remote exploitation is possible if the application processes untrusted input remotely. Lack of proper input validation significantly increases the likelihood of successful exploitation.

What are the Known Public Exploits?

PoC Author	Link	Commentary
No known exploits

What are the Available Fixes for CVE-2020-7751?

Available Upgrade Options

pathval
- <1.1.1 → Upgrade to 1.1.1

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Additional Resources

What are Similar Vulnerabilities to CVE-2020-7751?

Similar Vulnerabilities: CVE-2020-28499 , CVE-2020-8116 , CVE-2019-10747 , CVE-2019-11358 , CVE-2020-15250

CVE-2020-7751 Prototype Pollution vulnerability in pathval