| Name | CVE-2025-27219 |
| Description | In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4082-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ruby2.7 (PTS) | bullseye | 2.7.4-1+deb11u1 | vulnerable |
| bullseye (security) | 2.7.4-1+deb11u5 | fixed |
| ruby3.1 (PTS) | bookworm, bookworm (security) | 3.1.2-7+deb12u1 | vulnerable |
| sid | 3.1.2-8.5 | vulnerable |
| ruby3.3 (PTS) | sid, trixie | 3.3.7-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| ruby2.7 | source | bullseye | 2.7.4-1+deb11u5 | | DLA-4082-1 | |
| ruby2.7 | source | (unstable) | (unfixed) | | | |
| ruby3.1 | source | (unstable) | (unfixed) | | | |
| ruby3.3 | source | (unstable) | (unfixed) | | | |
Notes
[bookworm] - ruby3.1 <no-dsa> (Minor issue)
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27219.yml
https://github.com/ruby/cgi/commit/9907b76dad0777ee300de236dad4b559e07596ab (v0.4.2)
https://github.com/ruby/cgi/pull/52