CVE-2021-29509

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2021-29509
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-29509.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-29509
Aliases
Downstream
Related
Published
2021-05-11T17:15:07.627Z
Modified
2026-04-11T12:36:20.011949Z
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 puma server which received more concurrent keep-alive connections 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 in puma 4.3.8 and 5.3.1. Setting queue_requests false also fixes the issue. This is not advised when using puma without a reverse proxy, such as nginx or apache, 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.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "10.0"
                }
            ],
            "cpe": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
        }
    ]
}
References

Affected packages

Git / github.com/puma/puma

Affected ranges

Type
GIT
Repo
https://github.com/puma/puma
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b911c13f8797aacaa8decf8532d6d7d45fda334f
Introduced
13e18e8078c800adfc52af687acc1d8de5f3988d
Fixed
1c91a4f1af23328118dbfe5b615f812af5e817ef
Database specific 
{
    "source": "CPE_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.3.8"
        },
        {
            "introduced": "5.0.0"
        },
        {
            "fixed": "5.3.1"
        }
    ],
    "cpe": "cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:*"
}

Affected versions

v1.*
v1.1.0
v1.1.1
v1.2.0
v1.2.1
v1.2.2
v1.3.0
v1.3.1
v1.4.0
v1.5.0
v2.*
v2.0.0
v2.0.0.b2
v2.0.0.b3
v2.0.0.b4
v2.0.0.b5
v2.0.0.b6
v2.0.0.b7
v2.0.1
v2.1.0
v2.1.1
v2.10.0
v2.10.1
v2.10.2
v2.11.0
v2.11.2
v2.11.3
v2.12.0
v2.12.1
v2.12.2
v2.12.3
v2.13.0
v2.13.1
v2.13.2
v2.13.3
v2.13.4
v2.14.0
v2.15.0
v2.15.1
v2.15.2
v2.15.3
v2.16.0
v2.2.0
v2.2.1
v2.2.2
v2.3.0
v2.3.1
v2.3.2
v2.4.0
v2.4.1
v2.5.0
v2.5.1
v2.6.0
v2.7.0
v2.7.1
v2.8.1
v2.8.2
v2.9.0
v2.9.1
v2.9.2
v3.*
v3.0.0
v3.0.0.rc1
v3.0.1
v3.0.2
v3.1.0
v3.1.1
v3.10.0
v3.11.0
v3.11.1
v3.11.2
v3.11.3
v3.11.4
v3.12.0
v3.2.0
v3.3.0
v3.4.0
v3.5.0
v3.5.1
v3.5.2
v3.6.0
v3.7.1
v3.8.0
v3.9.0
v3.9.1
v4.*
v4.0.0
v4.0.1
v4.1.0
v4.2.0
v4.2.1
v4.3.0
v4.3.1
v4.3.2
v4.3.3
v4.3.4
v4.3.5
v4.3.6
v4.3.7
v5.*
v5.0.0
v5.0.1
v5.0.2
v5.0.3
v5.1.0
v5.2.0
v5.2.1
v5.2.2
v5.3.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-29509.json"