CVE-2024-35176: rexml DoS — Fix

Description

REXML is an XML toolkit for Ruby. The REXML gem before 3.2.6 has a denial of service vulnerability when it parses an XML that has many `<`s in an attribute value. Those who need to parse untrusted XMLs may be impacted to this vulnerability. The REXML gem 3.2.7 or later include the patch to fix this vulnerability. As a workaround, don't parse untrusted XMLs.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
ruby-lang	rexml	< 3.2.7

References

Advisories & Patches

https://github.com/ruby/rexml/commit/4325835f92f3f142ebd91a3fdba4e1f1ab7f1cfb https://github.com/ruby/rexml/security/advisories/GHSA-vg3r-rm7w-2xgh https://www.ruby-lang.org/en/news/2024/05/16/dos-rexml-cve-2024-35176 https://github.com/ruby/rexml/commit/4325835f92f3f142ebd91a3fdba4e1f1ab7f1cfb https://github.com/ruby/rexml/security/advisories/GHSA-vg3r-rm7w-2xgh https://www.ruby-lang.org/en/news/2024/05/16/dos-rexml-cve-2024-35176

Other References

https://lists.debian.org/debian-lts-announce/2025/01/msg00011.html https://security.netapp.com/advisory/ntap-20250306-0001/

Frequently Asked Questions

What is CVE-2024-35176? +

REXML is an XML toolkit for Ruby. The REXML gem before 3.2.6 has a denial of service vulnerability when it parses an XML that has many `<`s in an attribute value. Those who need to parse untrusted XMLs may be impacted to this vulnerability. The REXML gem 3.2.7 or later include the patch to fix this vulnerability. As a workaround, don't parse untrusted XMLs. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-35176? +

CVE-2024-35176 has a CVSS v3.1 score of 5.3 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-2024-35176? +

CVE-2024-35176 affects products from ruby-lang, specifically: rexml. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-35176? +

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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