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`aiohttp` Open Redirect vulnerability (`normalize_path_middleware` middleware)

Low severity GitHub Reviewed Published Feb 25, 2021 in aio-libs/aiohttp • Updated Sep 3, 2024

Package

pip aiohttp (pip)

Affected versions

< 3.7.4

Patched versions

3.7.4

Description

Impact

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.

Patches

This security problem has been fixed in v3.7.4. Upgrade your dependency as follows:
pip install aiohttp >= 3.7.4

Workarounds

If upgrading is not an option for you, a workaround can be to avoid using aiohttp.web_middlewares.normalize_path_middleware in your applications.

References

For more information

If you have any questions or comments about this advisory:

Credit: Jelmer Vernooij and Beast Glatisant.

References

@webknjaz webknjaz published to aio-libs/aiohttp Feb 25, 2021
Reviewed Feb 26, 2021
Published to the GitHub Advisory Database Feb 26, 2021
Published by the National Vulnerability Database Feb 26, 2021
Last updated Sep 3, 2024

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS score

1.030%
(84th percentile)

Weaknesses

CVE ID

CVE-2021-21330

GHSA ID

GHSA-v6wp-4m6f-gcjg

Source code

Credits

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