CVE-2019-16770

HIGH EPSS 77.8%
Published Dec 5, 20196y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Dec 5, 2019 6y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
77.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-770

Affected Products 3

VendorProductVersionRange
pumapuma*≥3.0.0  –  <3.12.2
pumapuma*≥4.0.0  –  <4.3.1
debiandebian_linux9.0any

References 2

  • github.com https://github.com/puma/puma/security/advisories/GHSA-7xx3-m584-x994
    MitigationThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html
    Mailing ListThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.