CVE-2021-29509
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-29509
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-29509.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-29509
- Aliases
- Related
- Published
- 2021-05-11T17:15:07Z
- Modified
- 2024-10-12T07:13:06.746480Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Puma is a concurrent HTTP 1.1 server for Ruby/Rack applications. The fix for CVE-2019-16770 was incomplete. The original fix only protected existing connections that had already been accepted from having their requests starved by greedy persistent-connections saturating all threads in the same process. However, new connections may still be starved by greedy persistent-connections saturating all threads in all processes in the cluster. A
pumaserver which received more concurrentkeep-aliveconnections than the server had threads in its threadpool would service only a subset of connections, denying service to the unserved connections. This problem has been fixed inpuma4.3.8 and 5.3.1. Settingqueue_requests falsealso fixes the issue. This is not advised when usingpumawithout a reverse proxy, such asnginxorapache, because you will open yourself to slow client attacks (e.g. slowloris). The fix is very small and a git patch is available for those using unsupported versions of Puma. - References
-
- https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5
- https://security.gentoo.org/glsa/202208-28
- https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
- https://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837
- https://github.com/puma/puma/security/policy
- https://rubygems.org/gems/puma
- https://security-tracker.debian.org/tracker/CVE-2021-29509
Affected packages
Debian:11 / puma
Package
- Name
- puma
- Purl
- pkg:deb/debian/puma?arch=source
Debian:12 / puma
Package
- Name
- puma
- Purl
- pkg:deb/debian/puma?arch=source
Debian:13 / puma
Package
- Name
- puma
- Purl
- pkg:deb/debian/puma?arch=source
Git / github.com/puma/puma
Affected ranges
- Type
- GIT
- Repo
- https://github.com/puma/puma
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed