CVE-2024-39908: rexml DoS — Fix

Description

REXML is an XML toolkit for Ruby. The REXML gem before 3.3.1 has some DoS vulnerabilities when it parses an XML that has many specific characters such as `<`, `0` and `%>`. If you need to parse untrusted XMLs, you many be impacted to these vulnerabilities. The REXML gem 3.3.2 or later include the patches to fix these vulnerabilities. Users are advised to upgrade. Users unable to upgrade should avoid parsing untrusted XML strings.

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CVSS v3.1 Score

4.3

MEDIUM

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

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor	Product	Versions
ruby-lang	rexml	< 3.3.2
netapp	bootstrap_os	All
netapp	hci_compute_node	All

References

Advisories & Patches

https://github.com/ruby/rexml/security/advisories/GHSA-4xqq-m2hx-25v8 https://www.ruby-lang.org/en/news/2024/07/16/dos-rexml-cve-2024-39908 https://github.com/ruby/rexml/security/advisories/GHSA-4xqq-m2hx-25v8 https://www.ruby-lang.org/en/news/2024/07/16/dos-rexml-cve-2024-39908

Other References

https://lists.debian.org/debian-lts-announce/2025/01/msg00011.html https://security.netapp.com/advisory/ntap-20250117-0008/

Frequently Asked Questions

What is CVE-2024-39908? +

REXML is an XML toolkit for Ruby. The REXML gem before 3.3.1 has some DoS vulnerabilities when it parses an XML that has many specific characters such as `<`, `0` and `%>`. If you need to parse untrusted XMLs, you many be impacted to these vulnerabilities. The REXML gem 3.3.2 or later include the patches to fix these vulnerabilities. Users are advised to upgrade. Users unable to upgrade should avoid parsing untrusted XML strings. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2024-39908? +

CVE-2024-39908 has a CVSS v3.1 score of 4.3 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-2024-39908? +

CVE-2024-39908 affects products from netapp, ruby-lang, specifically: bootstrap_os, hci_compute_node, rexml. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-39908? +

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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