CVE-2024-1892: scrapy — Exploit & Fix

Description

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the XMLFeedSpider class of the scrapy/scrapy project, specifically in the parsing of XML content. By crafting malicious XML content that exploits inefficient regular expression complexity used in the parsing process, an attacker can cause a denial-of-service (DoS) condition. This vulnerability allows for the system to hang and consume significant resources, potentially rendering services that utilize Scrapy for XML processing unresponsive.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-1333 CWE-1333

Affected Products

Vendor	Product	Versions
scrapy	scrapy	< 2.11.1

References

Advisories & Patches

https://github.com/scrapy/scrapy/commit/479619b340f197a8f24c5db45bc068fb8755f2c5 https://huntr.com/bounties/271f94f2-1e05-4616-ac43-41752389e26b https://github.com/scrapy/scrapy/commit/479619b340f197a8f24c5db45bc068fb8755f2c5 https://huntr.com/bounties/271f94f2-1e05-4616-ac43-41752389e26b

Exploits

https://huntr.com/bounties/271f94f2-1e05-4616-ac43-41752389e26b https://huntr.com/bounties/271f94f2-1e05-4616-ac43-41752389e26b

Frequently Asked Questions

What is CVE-2024-1892? +

A Regular Expression Denial of Service (ReDoS) vulnerability exists in the XMLFeedSpider class of the scrapy/scrapy project, specifically in the parsing of XML content. By crafting malicious XML content that exploits inefficient regular expression complexity used in the parsing process, an attacker can cause a denial-of-service (DoS) condition. This vulnerability allows for the system to hang and consume significant resources, potentially rendering services that utilize Scrapy for XML processing unresponsive. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-1892? +

CVE-2024-1892 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-1892? +

CVE-2024-1892 affects products from scrapy, specifically: scrapy. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-1892? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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