// For flags

CVE-2022-31015

Uncaught Exception (due to a data race) leads to process termination in Waitress

Severity Score

5.9
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Waitress is a Web Server Gateway Interface server for Python 2 and 3. Waitress versions 2.1.0 and 2.1.1 may terminate early due to a thread closing a socket while the main thread is about to call select(). This will lead to the main thread raising an exception that is not handled and then causing the entire application to be killed. This issue has been fixed in Waitress 2.1.2 by no longer allowing the WSGI thread to close the socket. Instead, that is always delegated to the main thread. There is no work-around for this issue. However, users using waitress behind a reverse proxy server are less likely to have issues if the reverse proxy always reads the full response.

Waitress es un servidor de Interfaz de Pasarela del Servidor Web para Python versiones 2 y 3. Las versiones 2.1.0 y 2.1.1 de Waitress pueden terminar antes de tiempo debido a que un hilo cierra un socket mientras el hilo principal está a punto de llamar a select(). Esto conllevaba a que el hilo principal lanzara una excepción que no es manejada y que causaba la muerte de toda la aplicación. Este problema ha sido corregido en Waitress versión 2.1.2, al no permitir que el hilo WSGI cierre el socket. En su lugar, esto es delegado siempre en el hilo principal. No se presenta ninguna mitigación para este problema. Sin embargo, los usuarios usando waitress detrás de un servidor proxy inverso presentan menos probabilidades de tener problemas si el proxy inverso siempre lee la respuesta completa

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-05-18 CVE Reserved
  • 2022-05-31 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-08-03 First Exploit
  • 2024-08-22 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-248: Uncaught Exception
  • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Agendaless
Search vendor "Agendaless"
 Waitress
Search vendor "Agendaless" for product "Waitress"
 >= 2.1.0 < 2.1.2
Search vendor "Agendaless" for product "Waitress" and version " >= 2.1.0 < 2.1.2"
-
Affected