// For flags

CVE-2021-21330

Open redirect vulnerability in aiohttp

Severity Score

6.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In aiohttp before version 3.7.4 there is an open redirect vulnerability. A maliciously crafted link to an aiohttp-based web-server could redirect the browser to a different website. It is caused by a bug in the `aiohttp.web_middlewares.normalize_path_middleware` middleware. This security problem has been fixed in 3.7.4. Upgrade your dependency using pip as follows "pip install aiohttp >= 3.7.4". If upgrading is not an option for you, a workaround can be to avoid using `aiohttp.web_middlewares.normalize_path_middleware` in your applications.

aiohttp es un framework cliente/servidor HTTP asincrónico para asyncio y Python. En aiohttp versiones anteriores a 3.7.4, se presenta una vulnerabilidad de redireccionamiento abierto. Un enlace diseñado malicioso en un servidor web basado en aiohttp podría redireccionar el navegador a un sitio web diferente. Es causado por un error en el middleware "aiohttp.web_middlewares.normalize_path_middleware". Este problema de seguridad ha sido corregido en versión 3.7.4. Actualice su dependencia usando pip de la siguiente manera "pip install aiohttp versiones posteriores o incluyendo a 3.7.4". Si la actualización no es una opción para usted, una solución alternativa puede ser evitar el uso de "aiohttp.web_middlewares.normalize_path_middleware" en sus aplicaciones

An open redirect flaw was found in python-aiohttp. This flaw allows a remote, unauthenticated attacker to trick users into visiting a malicious webpage, disguised as a legitimate webpage and affects applications using the normalize_path_middleware functionality. The highest threat from this vulnerability is to confidentiality and integrity.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-12-22 CVE Reserved
  • 2021-02-26 CVE Published
  • 2024-04-29 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-601: URL Redirection to Untrusted Site ('Open Redirect')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Aiohttp
Search vendor "Aiohttp"
 Aiohttp
Search vendor "Aiohttp" for product "Aiohttp"
 < 3.7.4
Search vendor "Aiohttp" for product "Aiohttp" and version " < 3.7.4"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 10.0
Search vendor "Debian" for product "Debian Linux" and version "10.0"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 33
Search vendor "Fedoraproject" for product "Fedora" and version "33"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 34
Search vendor "Fedoraproject" for product "Fedora" and version "34"
-
Affected