Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS0ycnhwLXY2cHctY2g2bc4ABAtZ

REXML ReDoS vulnerability

Impact

The REXML gem before 3.3.9 has a ReDoS vulnerability when it parses an XML that has many digits between &# and x...; in a hex numeric character reference (&#x...;).

This does not happen with Ruby 3.2 or later. Ruby 3.1 is the only affected maintained Ruby. Note that Ruby 3.1 will reach EOL on 2025-03.

Patches

The REXML gem 3.3.9 or later include the patch to fix the vulnerability.

Workarounds

Use Ruby 3.2 or later instead of Ruby 3.1.

References

• https://www.ruby-lang.org/en/news/2024/10/28/redos-rexml-cve-2024-49761/: An announce on www.ruby-lang.org

Permalink: https://github.com/advisories/GHSA-2rxp-v6pw-ch6m
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS0ycnhwLXY2cHctY2g2bc4ABAtZ
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 10 days ago
Updated: 8 days ago

CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Identifiers: GHSA-2rxp-v6pw-ch6m, CVE-2024-49761
References:

• https://github.com/ruby/rexml/security/advisories/GHSA-2rxp-v6pw-ch6m
• https://github.com/ruby/rexml/commit/ce59f2eb1aeb371fe1643414f06618dbe031979f
• https://www.ruby-lang.org/en/news/2024/10/28/redos-rexml-cve-2024-49761
• https://nvd.nist.gov/vuln/detail/CVE-2024-49761
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2024-49761.yml
• https://github.com/advisories/GHSA-2rxp-v6pw-ch6m

Repository: https://github.com/ruby/rexml
Blast Radius: 40.7

Affected Packages