GitHub Advisoryadvisory · RubyGems
GHSA-2rxp-v6pw-ch6m REXML ReDoS vulnerability
MEDIUM
Official page ↗
- Aliases
- CVE-2024-49761
- Ecosystem
- RubyGems
- Packages
- rexml
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-1333
- Reviewed
- 2024-10-28
Affected packages
• RubyGems rexml: < 3.3.9 → fixed in 3.3.9
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/: An announce on www.ruby-lang.org
Related
Alias · CVE (1)
- CVE-2024-49761 REXML is an XML toolkit for Ruby. vulnerability
Weakness · CWE (1)
- CWE-1333 Inefficient Regular Expression Complexity weakness
References
- https://github.com/ruby/rexml/security/advisories/GHSA-2rxp-v6pw-ch6m web
- https://nvd.nist.gov/vuln/detail/CVE-2024-49761 advisory
- https://github.com/ruby/rexml/commit/ce59f2eb1aeb371fe1643414f06618dbe031979f web
- https://github.com/ruby/rexml package
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2024-49761.yml web
- https://lists.debian.org/debian-lts-announce/2025/01/msg00011.html web
- https://security.netapp.com/advisory/ntap-20241227-0004 web
- https://www.ruby-lang.org/en/news/2024/10/28/redos-rexml-cve-2024-49761 web