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aiohttp Cross-site Scripting vulnerability on index pages for static file handling

Moderate severity GitHub Reviewed Published Apr 17, 2024 in aio-libs/aiohttp • Updated May 2, 2024

Package

pip aiohttp (pip)

Affected versions

< 3.9.4

Patched versions

3.9.4

Description

Summary

A XSS vulnerability exists on index pages for static file handling.

Details

When using web.static(..., show_index=True), the resulting index pages do not escape file names.

If users can upload files with arbitrary filenames to the static directory, the server is vulnerable to XSS attacks.

Workaround

We have always recommended using a reverse proxy server (e.g. nginx) for serving static files. Users following the recommendation are unaffected.

Other users can disable show_index if unable to upgrade.

Patch: https://github.com/aio-libs/aiohttp/pull/8319/files

References

@Dreamsorcerer Dreamsorcerer published to aio-libs/aiohttp Apr 17, 2024
Published to the GitHub Advisory Database Apr 18, 2024
Reviewed Apr 18, 2024
Published by the National Vulnerability Database Apr 18, 2024
Last updated May 2, 2024

Severity

Moderate
6.1
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CVE ID

CVE-2024-27306

GHSA ID

GHSA-7gpw-8wmc-pm8g

Source code

Credits

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