CVE-2019-16770
Description
In Puma before versions 3.12.2 and 4.3.1, a poorly-behaved client could use keepalive requests to monopolize Puma's reactor and create a denial of service attack. If more keepalive connections to Puma are opened than there are threads available, additional connections will wait permanently if the attacker sends requests frequently enough. This vulnerability is patched in Puma 4.3.1 and 3.12.2.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 3.12.0-4 |
| debian | bullseye | fixed | 3.12.0-4 |
| debian | forky | fixed | 3.12.0-4 |
| debian | sid | fixed | 3.12.0-4 |
| debian | trixie | fixed | 3.12.0-4 |
References
- https://github.com/puma/puma/security/advisories/GHSA-7xx3-m584-x994
- https://www.suse.com/security/cve/CVE-2019-16770.html
- https://nvd.nist.gov/vuln/detail/CVE-2019-16770
- https://github.com/advisories/GHSA-7xx3-m584-x994
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2019-16770.yml
- https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html
- https://security-tracker.debian.org/tracker/CVE-2019-16770
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.