CVE-2024-27306: aiohttp vulnerable to XSS on index pages for static file handling
First published: Thu Apr 18 2024(Updated: )
### 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
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/aiohttp | <3.9.4 | 3.9.4 |
| redhat/aiohttp | <3.9.4 | 3.9.4 |
| IBM Security QRadar | <=3.12 |
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Reference Links
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-7gpw-8wmc-pm8g
- https://github.com/aio-libs/aiohttp/pull/8319/files
- https://github.com/aio-libs/aiohttp/commit/28335525d1eac015a7e7584137678cbb6ff19397
- https://nvd.nist.gov/vuln/detail/CVE-2024-27306
- https://github.com/aio-libs/aiohttp/pull/8319
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2EXRGTN2WG7VZLUZ7WOXU5GQJKCPPHKP
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NWEI6NIHZ3G7DURDZVMRK7ZEFC2BTD3U
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZIVBMPEY7WWOFMC3CWXFBRQPFECV4SW3
- https://github.com/advisories/GHSA-7gpw-8wmc-pm8g (Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2EXRGTN2WG7VZLUZ7WOXU5GQJKCPPHKP/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NWEI6NIHZ3G7DURDZVMRK7ZEFC2BTD3U/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZIVBMPEY7WWOFMC3CWXFBRQPFECV4SW3/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2275990
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2275991
- https://access.redhat.com/errata/RHSA-2024:3781
- https://access.redhat.com/errata/RHSA-2024:5662
- https://access.redhat.com/errata/RHSA-2025:1335
- https://bugzilla.redhat.com/show_bug.cgi?id=2275989
- https://www.ibm.com/support/pages/node/7185938 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2024-27306?
CVE-2024-27306 is considered a moderate severity XSS vulnerability due to improper file name escaping.
How do I fix CVE-2024-27306?
To fix CVE-2024-27306, update aiohttp to version 3.9.4 or later.
What specific functionality is affected by CVE-2024-27306?
CVE-2024-27306 affects the static file handling feature when using `web.static(..., show_index=True)`.
Can arbitrary file names exploit CVE-2024-27306?
Yes, arbitrary file names uploaded to the static directory can exploit CVE-2024-27306.
Which versions of aiohttp are vulnerable to CVE-2024-27306?
Aiohttp versions prior to 3.9.4 are vulnerable to CVE-2024-27306.
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