GHSA-gh9q-2xrm-x6qv
CGI has Denial of Service (DoS) potential in Cookie.parse
At a glance
- Published
- Updated
- CVE
- CVE-2025-27219
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
- CVSS_V4
- CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Description
There is a possibility for DoS by in the cgi gem. This vulnerability has been assigned the CVE identifier CVE-2025-27219. We recommend upgrading the cgi gem. ## Details CGI::Cookie.parse took super-linear time to parse a cookie string in some cases. Feeding a maliciously crafted cookie string into the method could lead to a Denial of Service. Please update CGI gem to version 0.3.5.1, 0.3.7, 0.4.2 or later. ## Affected versions cgi gem versions <= 0.3.5, 0.3.6, 0.4.0 and 0.4.1. ## Credits Thanks to lio346 for discovering this issue. Also thanks to mame for fixing this vulnerability.
Affected packages
| Package | Versions |
|---|---|
| RubyGems · cgi | introduced 0, fixed 0.3.5.1 |
| RubyGems · cgi | introduced 0.3.6, fixed 0.3.7 |
| RubyGems · cgi | introduced 0.4.0, fixed 0.4.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-27219 ADVISORY
- https://github.com/ruby/cgi/pull/52 WEB
- https://github.com/ruby/cgi/pull/53 WEB
- https://github.com/ruby/cgi/pull/54 WEB
- https://hackerone.com/reports/2936778 WEB
- https://github.com/ruby/cgi PACKAGE
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27219.yml WEB
- https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html WEB
- https://www.cve.org/CVERecord?id=CVE-2025-27219 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |