CVE-2020-8124
Insufficient Validation vulnerability in url-parse (npm)
What is CVE-2020-8124 About?
The url-parse npm package version 1.4.4 and earlier has insufficient validation and sanitization of user input. This flaw may allow an attacker to bypass security checks. The impact can vary depending on where `url-parse` is used to enforce security policies. Exploitation complexity is moderate, requiring specially crafted URLs.
Affected Software
Technical Details
The url-parse npm package, in versions 1.4.4 and earlier, fails to adequately validate and sanitize certain aspects of user-supplied URLs. This can manifest in multiple ways, such as improper handling of schemes, hostnames, or paths, especially when encountering non-standard or malformed URL components. For instance, an attacker might craft a URL that appears benign after initial parsing but, upon deeper interpretation by other parts of an application, resolves to a forbidden resource or bypasses whitelisting rules. This bypass occurs because the url-parse package might return an incorrectly normalized or interpreted URL component, allowing it to slip past subsequent security checks that rely on accurate parsing.
What is the Impact of CVE-2020-8124?
Successful exploitation may allow attackers to bypass security checks, leading to unauthorized access to resources, circumvention of access controls, or other security policy violations, depending on the context of URL usage.
What is the Exploitability of CVE-2020-8124?
Exploitation of this vulnerability requires crafting specific malicious URLs that exploit the insufficient validation logic within the url-parse package. The complexity is moderate, as it requires an understanding of how the package parses URLs and how the higher-level application uses that parsed information for security checks. There are typically no authentication or privilege requirements to supply the malicious URL, assuming the application processes user-controlled URLs. This is a remote exploitation scenario. Special conditions include applications that use the url-parse package to enforce security policies (e.g., allowlisting domains, validating redirects), and which directly incorporate the potentially malformed output without further stringent validation. Risk factors increasing exploitation likelihood include applications that process and act upon arbitrary user-supplied URLs.
What are the Known Public Exploits?
| PoC Author | Link | Commentary |
|---|---|---|
| No known exploits | ||
What are the Available Fixes for CVE-2020-8124?
Available Upgrade Options
- url-parse
- <1.4.5 → Upgrade to 1.4.5
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What are Similar Vulnerabilities to CVE-2020-8124?
Similar Vulnerabilities: CVE-2023-49080 , CVE-2023-28432 , CVE-2022-24755 , CVE-2022-31057 , CVE-2021-25316
