Resource exhaustion in Puma
CVE-2019-16770
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.020 (80.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Puma — versions < 4.3.1
- Debian Linux — versions 9.0
Weakness classification (CWE)
References
- github.com/puma/puma/security/advisories/GHSA-7xx3-m584-x994 (Third Party Advisory, Mitigation)
- lists.debian.org/debian-lts-announce/2022/05/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-16770?
- CVE-2019-16770 is a medium-severity vulnerability in Puma, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2019-12-05.
- How severe is CVE-2019-16770?
- Medium severity. CVSS v3 base score is 5.3 out of 10.