High severity8.8NVD Advisory· Published Nov 18, 2022· Updated Jun 17, 2026
CVE-2021-33621
CVE-2021-33621
Description
The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
cgiRubyGems | >= 0.3.0, < 0.3.5 | 0.3.5 |
cgiRubyGems | >= 0.2.0, < 0.2.2 | 0.2.2 |
cgiRubyGems | < 0.1.0.2 | 0.1.0.2 |
Affected products
72- Ruby/cgi gemdescription
- osv-coords66 versionspkg:apk/wolfi/ruby-3.0-docpkg:gem/cgipkg:apk/wolfi/ruby-3.0-devpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-ESPOSpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/ruby2.5&distro=SUSE%20Manager%20Server%204.2pkg:rpm/suse/ruby2.5&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/opensuse/ruby2.5&distro=openSUSE%20Leap%2015.4pkg:apk/chainguard/ruby-3.0pkg:apk/wolfi/ruby-3.0pkg:apk/chainguard/ruby-3.0-devpkg:apk/chainguard/ruby-3.0-docpkg:bitnami/rubypkg:bitnami/ruby-minpkg:rpm/opensuse/ruby3.1&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/ruby2.5&distro=openSUSE%20Leap%2015.5pkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4pkg:rpm/almalinux/rubypkg:rpm/almalinux/ruby-default-gemspkg:rpm/almalinux/ruby-develpkg:rpm/almalinux/ruby-docpkg:rpm/almalinux/ruby-libspkg:rpm/almalinux/rubygem-abrtpkg:rpm/almalinux/rubygem-abrt-docpkg:rpm/almalinux/rubygem-bigdecimalpkg:rpm/almalinux/rubygem-bsonpkg:rpm/almalinux/rubygem-bson-docpkg:rpm/almalinux/rubygem-bundlerpkg:rpm/almalinux/rubygem-io-consolepkg:rpm/almalinux/rubygem-irbpkg:rpm/almalinux/rubygem-jsonpkg:rpm/almalinux/rubygem-minitestpkg:rpm/almalinux/rubygem-mongopkg:rpm/almalinux/rubygem-mongo-docpkg:rpm/almalinux/rubygem-mysql2pkg:rpm/almalinux/rubygem-mysql2-docpkg:rpm/almalinux/rubygem-net-telnetpkg:rpm/almalinux/rubygem-opensslpkg:rpm/almalinux/rubygem-pgpkg:rpm/almalinux/rubygem-pg-docpkg:rpm/almalinux/rubygem-power_assertpkg:rpm/almalinux/rubygem-psychpkg:rpm/almalinux/rubygem-rakepkg:rpm/almalinux/rubygem-rdocpkg:rpm/almalinux/rubygem-test-unitpkg:rpm/almalinux/rubygem-xmlrpcpkg:rpm/almalinux/rubygemspkg:rpm/almalinux/rubygems-develpkg:rpm/almalinux/ruby-irbpkg:rpm/almalinux/rubygem-bundler-docpkg:rpm/almalinux/rubygem-did_you_meanpkg:rpm/almalinux/ruby-bundled-gemspkg:rpm/almalinux/rubygem-rbspkg:rpm/almalinux/rubygem-rexmlpkg:rpm/almalinux/rubygem-rsspkg:rpm/almalinux/rubygem-typeprofpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/ruby2.5&distro=SUSE%20Manager%20Proxy%204.2pkg:rpm/suse/ruby2.5&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5
< 3.0.5-r0+ 65 more
- (no CPE)range: < 3.0.5-r0
- (no CPE)range: >= 0.3.0, < 0.3.5
- (no CPE)range: < 3.0.5-r0
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 3.0.5-r0
- (no CPE)range: < 3.0.5-r0
- (no CPE)range: < 3.0.5-r0
- (no CPE)range: < 3.0.5-r0
- (no CPE)range: >= 2.7.0, < 2.7.7
- (no CPE)range: >= 2.7.0, < 2.7.7
- (no CPE)range: < 3.1.3-1.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.7.8-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 2.7.8-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 2.7.8-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 2.7.8-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 2.7.8-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 0.4.0-1.module_el8.3.0+6147+d0dfc1e4
- (no CPE)range: < 0.4.0-1.module_el8.3.0+6147+d0dfc1e4
- (no CPE)range: < 2.0.0-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 4.8.1-1.module_el8.5.0+117+35d1289b
- (no CPE)range: < 4.8.1-1.module_el8.3.0+6147+d0dfc1e4
- (no CPE)range: < 2.2.24-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 0.5.6-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 1.2.6-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 2.3.0-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 5.13.0-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 2.11.3-1.module_el8.3.0+6147+d0dfc1e4
- (no CPE)range: < 2.11.3-1.module_el8.3.0+6147+d0dfc1e4
- (no CPE)range: < 0.5.3-1.module_el8.4.0+2399+4e3a532a
- (no CPE)range: < 0.5.3-1.module_el8.3.0+6147+d0dfc1e4
- (no CPE)range: < 0.2.0-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 2.1.4-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 1.2.3-1.module_el8.3.0+6147+d0dfc1e4
- (no CPE)range: < 1.2.3-1.module_el8.3.0+6147+d0dfc1e4
- (no CPE)range: < 1.1.7-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 3.1.0-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 13.0.1-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 6.2.1.1-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 3.3.4-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 0.3.0-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 3.1.6-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 3.1.6-139.module_el8.8.0+3578+2b4b06da
- (no CPE)range: < 2.5.9-111.module_el8.9.0+3635+c6f99506
- (no CPE)range: < 1.16.1-4.module_el8.5.0+2625+ec418553
- (no CPE)range: < 1.2.0-111.module_el8.9.0+3635+c6f99506
- (no CPE)range: < 3.1.4-142.module_el8.9.0+3746+91b8233a
- (no CPE)range: < 2.7.0-142.module_el8.9.0+3746+91b8233a
- (no CPE)range: < 3.2.5-142.module_el8.9.0+3746+91b8233a
- (no CPE)range: < 0.2.9-142.module_el8.9.0+3746+91b8233a
- (no CPE)range: < 0.21.3-142.module_el8.9.0+3746+91b8233a
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
- (no CPE)range: < 2.5.9-150000.4.29.1
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
20- www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/nvdExploitThird Party Advisory
- github.com/advisories/GHSA-vc47-6rqg-c7f5ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-33621ghsaADVISORY
- security.netapp.com/advisory/ntap-20221228-0004/nvdThird Party Advisory
- github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2021-33621.ymlghsaWEB
- hackerone.com/reports/1204695ghsaWEB
- lists.debian.org/debian-lts-announce/2023/06/msg00012.htmlnvdWEB
- lists.debian.org/debian-lts-announce/2024/09/msg00000.htmlnvdWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBXghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZDghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVASghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBXghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZDghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVASghsaWEB
- security.gentoo.org/glsa/202401-27nvdWEB
- security.netapp.com/advisory/ntap-20221228-0004ghsaWEB
- www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621ghsaWEB
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS/nvd
News mentions
0No linked articles in our index yet.