Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/935952?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/935952?format=api", "purl": "pkg:deb/debian/puma@4.3.8-1?distro=trixie", "type": "deb", "namespace": "debian", "name": "puma", "version": "4.3.8-1", "qualifiers": { "distro": "trixie" }, "subpath": "", "is_vulnerable": false, "next_non_vulnerable_version": "4.3.8-1+deb11u3", "latest_non_vulnerable_version": "6.6.0-4", "affected_by_vulnerabilities": [], "fixing_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/47854?format=api", "vulnerability_id": "VCID-q37p-vzmm-aken", "summary": "Puma's Keepalive Connections Causing Denial Of Service\nThis vulnerability is related to [CVE-2019-16770](https://github.com/puma/puma/security/advisories/GHSA-7xx3-m584-x994).\n\n### Impact\n\nThe 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.\n\nA `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.\n\n### Patches\n\nThis problem has been fixed in `puma` 4.3.8 and 5.3.1.\n\n### Workarounds\n\nSetting `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](https://en.wikipedia.org/wiki/Slowloris_(computer_security))).\n\nThe fix is very small. [A git patch is available here](https://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837) for those using [unsupported versions](https://github.com/puma/puma/security/policy#supported-versions) of Puma.\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in [Puma](https://github.com/puma/puma).\n* To report problems with this fix or to report another vulnerability, see [our security policy.](https://github.com/puma/puma/security/policy)\n\n### Acknowledgements\n\nThank you to @MSP-Greg, @wjordan and @evanphx for their review on this issue. \n\nThank you to @ioquatix for providing a modified fork of `wrk` which made debugging this issue much easier.", "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29509.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29509.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29509", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80332", "published_at": "2026-05-14T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.8029", "published_at": "2026-05-12T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80274", "published_at": "2026-05-11T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80278", "published_at": "2026-05-09T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80262", "published_at": "2026-05-07T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.8024", "published_at": "2026-05-05T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80227", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80212", "published_at": "2026-04-26T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80202", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80173", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.8017", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.8014", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80148", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80164", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80145", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80138", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80109", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80122", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80102", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.01358", "scoring_system": "epss", "scoring_elements": "0.80094", "published_at": "2026-04-01T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-29509" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29509", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29509" }, { "reference_url": "https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" } ], "url": "https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml" }, { "reference_url": "https://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837" }, { "reference_url": "https://github.com/puma/puma", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/puma/puma" }, { "reference_url": "https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3", "scoring_elements": "" }, { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5" }, { "reference_url": "https://github.com/puma/puma/security/policy", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/puma/puma/security/policy" }, { "reference_url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-29509.yml", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-29509.yml" }, { "reference_url": "https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29509", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29509" }, { "reference_url": "https://rubygems.org/gems/puma", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://rubygems.org/gems/puma" }, { "reference_url": "https://security.gentoo.org/glsa/202208-28", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://security.gentoo.org/glsa/202208-28" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=1964874", "reference_id": "1964874", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1964874" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989054", "reference_id": "989054", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989054" }, { "reference_url": "https://github.com/advisories/GHSA-q28m-8xjw-8vr5", "reference_id": "GHSA-q28m-8xjw-8vr5", "reference_type": "", "scores": [ { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-q28m-8xjw-8vr5" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:4702", "reference_id": "RHSA-2021:4702", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:4702" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/935952?format=api", "purl": "pkg:deb/debian/puma@4.3.8-1?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/puma@4.3.8-1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/935948?format=api", "purl": "pkg:deb/debian/puma@4.3.8-1%2Bdeb11u2?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-fhu7-fyha-9khj" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/puma@4.3.8-1%252Bdeb11u2%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/935946?format=api", "purl": "pkg:deb/debian/puma@5.6.5-3%2Bdeb12u1?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/puma@5.6.5-3%252Bdeb12u1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/935949?format=api", "purl": "pkg:deb/debian/puma@6.6.0-4?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/puma@6.6.0-4%3Fdistro=trixie" } ], "aliases": [ "CVE-2021-29509", "GHSA-q28m-8xjw-8vr5" ], "risk_score": 4.0, "exploitability": "0.5", "weighted_severity": "8.0", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-q37p-vzmm-aken" } ], "risk_score": null, "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/puma@4.3.8-1%3Fdistro=trixie" }