CVE-2024-49761: REXML ReDoS vulnerability
First published: Mon Oct 28 2024(Updated: )
### 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
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| rubygems/rexml | <3.3.9 | 3.3.9 |
| debian/ruby2.7 | 2.7.4-1+deb11u1 2.7.4-1+deb11u2 | |
| debian/ruby3.1 | <=3.1.2-7+deb12u1<=3.1.2-8.4 | |
| debian/ruby3.2 | <=3.2.3-1 | |
| debian/ruby3.3 | <=3.3.5-2 | |
| Ruby-lang Rexml | <3.3.9 |
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Reference Links
- https://github.com/ruby/rexml/commit/ce59f2eb1aeb371fe1643414f06618dbe031979f
- https://github.com/ruby/rexml/security/advisories/GHSA-2rxp-v6pw-ch6m
- 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 (Advisory)
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49761
- https://launchpad.net/bugs/cve/CVE-2024-49761
- https://security-tracker.debian.org/tracker/CVE-2024-49761
- https://ubuntu.com/security/CVE-2024-49761
- https://www.ruby-lang.org/en/news/2024/10/28/redos-rexml-cve-2024-49761/
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