Qs is a lightweight JavaScript library focusing on parsing and stringifying URL query strings, offering developers a simple solution for handling complex data structures within URLs. Version 0.0.7, released on March 13, 2011, builds upon the foundation of version 0.0.6, which was released about a month before, on February 14, 2011. Both iterations serve the same core purpose: simplifying the manipulation of query strings.
While the fundamental functionality remains consistent between the two versions, subtle improvements and refinements likely exist under the hood. Although specific change logs aren't provided, the brief interval between releases hints at bug fixes, performance enhancements, or minor API adjustments. Developers adopting or upgrading to version 0.0.7 can anticipate a more polished and potentially more efficient experience compared to its predecessor.
Notably, both versions are authored by TJ Holowaychuk, a prominent figure in the JavaScript ecosystem at the time. The presence of author URLs and email encourages community engagement and provides channels for developers to connect with the maintainer. While the repository URL is absent for version 0.0.6, version 0.0.7 already include the repository.
For developers seeking a reliable querystring parser, qs offers a straightforward and well-maintained solution. With its compact size and straightforward API, qs seamlessly integrates into various JavaScript projects, from front-end web applications to server-side Node.js environments, streamlining the processing of URL-encoded data.
All the vulnerabilities related to the version 0.0.7 of the package
Denial-of-Service Extended Event Loop Blocking in qs
Versions prior to 1.0.0 of qs are affected by a denial of service vulnerability that results from excessive recursion in parsing a deeply nested JSON string.
Update to version 1.0.0 or later
Denial-of-Service Memory Exhaustion in qs
Versions prior to 1.0 of qs are affected by a denial of service condition. This condition is triggered by parsing a crafted string that deserializes into very large sparse arrays, resulting in the process running out of memory and eventually crashing.
Update to version 1.0.0 or later.
Prototype Pollution Protection Bypass in qs
Affected version of qs are vulnerable to Prototype Pollution because it is possible to bypass the protection. The qs.parse function fails to properly prevent an object's prototype to be altered when parsing arbitrary input. Input containing [ or ] may bypass the prototype pollution protection and alter the Object prototype. This allows attackers to override properties that will exist in all objects, which may lead to Denial of Service or Remote Code Execution in specific circumstances.
Upgrade to 6.0.4, 6.1.2, 6.2.3, 6.3.2 or later.
qs vulnerable to Prototype Pollution
qs before 6.10.3 allows attackers to cause a Node process hang because an __ proto__ key can be used. In many typical web framework use cases, an unauthenticated remote attacker can place the attack payload in the query string of the URL that is used to visit the application, such as a[__proto__]=b&a[__proto__]&a[length]=100000000. The fix was backported to qs 6.9.7, 6.8.3, 6.7.3, 6.6.1, 6.5.3, 6.4.1, 6.3.3, and 6.2.4.
