ruby-advisory-db/gems/rexml/CVE-2024-49761.yml at master · rubysec/ruby-advisory-db · GitHub

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---
gem: rexml
cve: 2024-49761
ghsa: 2rxp-v6pw-ch6m
url: https://github.com/ruby/rexml/security/advisories/GHSA-2rxp-v6pw-ch6m
title: REXML ReDoS vulnerability
date: 2024-10-28
description: |
  ## 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
    * Announced on www.ruby-lang.org.
cvss_v3: 7.5
cvss_v4: 6.6
patched_versions:
  - ">= 3.3.9"
related:
  url:
    - https://nvd.nist.gov/vuln/detail/CVE-2024-49761
    - https://github.com/ruby/rexml/releases/tag/v3.3.9
    - 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://hackerone.com/reports/2807139
    - https://github.com/advisories/GHSA-2rxp-v6pw-ch6m