CGA-6jvc-fmj8-g22f: Prototype pollution vulnerability in commons-configuration2 (Maven)

What is CGA-6jvc-fmj8-g22f About?

This is a Prototype pollution vulnerability in the `resolveShims` function within `resolve-shims.js` of `thlorenz browserify-shim` version 3.8.15. It allows an attacker to inject arbitrary properties into JavaScript object prototypes. This can lead to remote code execution or denial of service and can be moderately easy to exploit if user-controlled input reaches the vulnerable function.

Affected Software

org.apache.commons:commons-configuration2 >2.0, <2.10.1

Technical Details

The vulnerability is a 'Prototype pollution' flaw in the resolveShims function located in resolve-shims.js of the thlorenz browserify-shim library, affecting version 3.8.15. Prototype pollution occurs when a malicious actor can add arbitrary properties to the Object.prototype (or other built-in constructors' prototypes), which then impacts all objects in the application's environment. Specifically, the vulnerability arises through the fullPath variable. An attacker can manipulate input that eventually becomes the fullPath variable to inject properties like __proto__ into an object, thereby modifying the global Object.prototype. This manipulation typically involves using specially crafted JSON or query string parameters that are recursively merged or assigned without proper validation of property names. Once the prototype is polluted, subsequent object creations or property lookups can be influenced by the attacker-controlled properties, potentially leading to denial of service, data tampering, or even remote code execution if sensitive application logic relies on these polluted properties in an unsafe manner.

What is the Impact of CGA-6jvc-fmj8-g22f?

Successful exploitation may allow attackers to inject arbitrary properties into JavaScript object prototypes, which can lead to denial of service, arbitrary code execution, or bypass of security mechanisms depending on the application context and subsequent operations.

What is the Exploitability of CGA-6jvc-fmj8-g22f?

Exploitation requires user-controlled input to reach the resolveShims function and manipulate the fullPath variable to inject __proto__ or similar properties. The complexity is moderate, as it depends on how user input is processed and whether it flows into the vulnerable function. There are typically no authentication or privilege requirements for the initial injection, although subsequent impacts might require existing application logic to trigger. This can be a remote vulnerability if the application exposes an endpoint that processes user input in a way that leads to the vulnerable function. Special conditions often involve specific JSON parsing or object merging operations. Risk factors include applications that accept unvalidated JSON input or query parameters and use the affected library.

What are the Known Public Exploits?

PoC Author	Link	Commentary
No known exploits

What are the Available Fixes for CGA-6jvc-fmj8-g22f?

Available Upgrade Options

org.apache.commons:commons-configuration2
- >2.0, <2.10.1 → Upgrade to 2.10.1

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Additional Resources

What are Similar Vulnerabilities to CGA-6jvc-fmj8-g22f?

Similar Vulnerabilities: CVE-2023-38035 , CVE-2022-29807 , CVE-2021-42036 , CVE-2020-13936 , CVE-2019-10098

CGA-6jvc-fmj8-g22f Prototype pollution vulnerability in commons-configuration2 (Maven)