| Name | CVE-2021-41819 |
| Description | CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby. |
| 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-2853-1, DSA-5066-1, DSA-5067-1, ELA-531-1 |
| Debian Bugs | 1002995 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ruby2.1 (PTS) | jessie, jessie (lts) | 2.1.5-2+deb8u13 | fixed |
| ruby2.3 (PTS) | stretch (security), stretch (lts), stretch | 2.3.3-1+deb9u11 | fixed |
| ruby2.5 (PTS) | buster | 2.5.5-3+deb10u4 | fixed |
| buster (security) | 2.5.5-3+deb10u6 | fixed |
| ruby2.7 (PTS) | bullseye (security), bullseye | 2.7.4-1+deb11u1 | fixed |
The information below is based on the following data on fixed versions.
Notes
Fixed in Ruby 3.0.3, 2.7.5, 2.6.9
https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/
Fixed by: https://github.com/ruby/cgi/commit/052eb3a828b0f99bca39cfd800f6c2b91307dbd5 (v0.3.1)