// For flags

CVE-2019-16770

Potential DOS attack in Puma

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

En Puma, anterior a las versiones 3.12.2 y 4.3.1, un cliente con mal comportamiento podría utilizar solicitudes de keepalive para monopolizar el reactor de Puma y crear un ataque de denegación de servicio. Si se abren más conexiones keepalive a Puma que hilos disponibles, las conexiones adicionales esperarán permanentemente si el atacante envía solicitudes con la suficiente frecuencia. Esta vulnerabilidad está reparada en Puma 4.3.1 y 3.12.2.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-09-24 CVE Reserved
  • 2019-12-05 CVE Published
  • 2024-03-30 EPSS Updated
  • 2024-08-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-770: Allocation of Resources Without Limits or Throttling
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Puma
Search vendor "Puma"
 Puma
Search vendor "Puma" for product "Puma"
 >= 3.0.0 < 3.12.2
Search vendor "Puma" for product "Puma" and version " >= 3.0.0 < 3.12.2"
ruby
Affected
Puma
Search vendor "Puma"
 Puma
Search vendor "Puma" for product "Puma"
 >= 4.0.0 < 4.3.1
Search vendor "Puma" for product "Puma" and version " >= 4.0.0 < 4.3.1"
ruby
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 9.0
Search vendor "Debian" for product "Debian Linux" and version "9.0"
-
Affected