Medium severity5.9NVD Advisory· Published Jan 8, 2024· Updated Jun 17, 2026
CVE-2024-21647
CVE-2024-21647
Description
Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies in a way that allowed HTTP request smuggling. Fixed versions limits the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. This vulnerability has been fixed in versions 6.4.2 and 5.6.8.
AI Insight
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pumaRubyGems | >= 6.0.0, < 6.4.2 | 6.4.2 |
pumaRubyGems | < 5.6.8 | 5.6.8 |
Affected products
14- osv-coords12 versionspkg:apk/chainguard/ruby3.2-pumapkg:apk/wolfi/ruby3.2-pumapkg:deb/ubuntu/[email protected]?arch=source&distro=manticpkg:gem/pumapkg:rpm/opensuse/rubygem-puma&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/rubygem-puma&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/rubygem-puma&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2pkg:rpm/suse/rubygem-puma&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3pkg:rpm/suse/rubygem-puma&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP4pkg:rpm/suse/rubygem-puma&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP5pkg:rpm/suse/rubygem-puma&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP6pkg:rpm/suse/rubygem-puma&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP7
< 6.4.2-r0+ 11 more
- (no CPE)range: < 6.4.2-r0
- (no CPE)range: < 6.4.2-r0
- (no CPE)range: < 5.6.5-4ubuntu2.1
- (no CPE)range: >= 6.0.0, < 6.4.2
- (no CPE)range: < 4.3.12-150000.3.15.1
- (no CPE)range: < 5.6.9-150600.18.3.1
- (no CPE)range: < 4.3.12-150000.3.15.1
- (no CPE)range: < 4.3.12-150000.3.15.1
- (no CPE)range: < 4.3.12-150000.3.15.1
- (no CPE)range: < 4.3.12-150000.3.15.1
- (no CPE)range: < 5.6.9-150600.18.3.1
- (no CPE)range: < 5.6.9-150600.18.3.1
Patches
Vulnerability mechanics
References
8- github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93nvdPatchWEB
- github.com/advisories/GHSA-c2f4-cvqm-65w2ghsaADVISORY
- github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2024-21647ghsaADVISORY
- github.com/puma/puma/commit/60d5ee3734adc8cee85c3f0561af392448fe19b7ghsaWEB
- github.com/puma/puma/commit/bbb880ffb6debbfdea535b4b3eb2204d49ae151dghsaWEB
- github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2024-21647.ymlghsaWEB
- lists.debian.org/debian-lts-announce/2024/11/msg00004.htmlnvdWEB
News mentions
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