CVE-2021-41125: HTTP authentication credential leak to target websites in scrapy
First published: Wed Oct 06 2021(Updated: )
### Impact If you use [`HttpAuthMiddleware`](http://doc.scrapy.org/en/latest/topics/downloader-middleware.html#module-scrapy.downloadermiddlewares.httpauth) (i.e. the `http_user` and `http_pass` spider attributes) for HTTP authentication, all requests will expose your credentials to the request target. This includes requests generated by Scrapy components, such as `robots.txt` requests sent by Scrapy when the `ROBOTSTXT_OBEY` setting is set to `True`, or as requests reached through redirects. ### Patches Upgrade to Scrapy 2.5.1 and use the new `http_auth_domain` spider attribute to control which domains are allowed to receive the configured HTTP authentication credentials. If you are using Scrapy 1.8 or a lower version, and upgrading to Scrapy 2.5.1 is not an option, you may upgrade to Scrapy 1.8.1 instead. ### Workarounds If you cannot upgrade, set your HTTP authentication credentials on a per-request basis, using for example the [`w3lib.http.basic_auth_header`](https://w3lib.readthedocs.io/en/latest/w3lib.html#w3lib.http.basic_auth_header) function to convert your credentials into a value that you can assign to the `Authorization` header of your request, instead of defining your credentials globally using [`HttpAuthMiddleware`](http://doc.scrapy.org/en/latest/topics/downloader-middleware.html#module-scrapy.downloadermiddlewares.httpauth). ### For more information If you have any questions or comments about this advisory: * [Open an issue](https://github.com/scrapy/scrapy/issues) * [Email us](mailto:opensource@zyte.com)
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Scrapy Scrapy | <1.8.1 | |
| Scrapy Scrapy | >=2.0.0<2.5.1 | |
| Debian Debian Linux | =9.0 | |
| pip/Scrapy | >=2.0.0<2.5.1 | 2.5.1 |
| pip/Scrapy | <1.8.1 | 1.8.1 |
| Debian | =9.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- http://doc.scrapy.org/en/latest/topics/downloader-middleware.html#module-scrapy.downloadermiddlewares.httpauth
- https://github.com/scrapy/scrapy/commit/b01d69a1bf48060daec8f751368622352d8b85a6
- https://github.com/scrapy/scrapy/security/advisories/GHSA-jwqp-28gf-p498
- https://lists.debian.org/debian-lts-announce/2022/03/msg00021.html
- https://w3lib.readthedocs.io/en/latest/w3lib.html#w3lib.http.basic_auth_header
- https://nvd.nist.gov/vuln/detail/CVE-2021-41125
- https://github.com/advisories/GHSA-jwqp-28gf-p498 (Advisory)
- https://github.com/pypa/advisory-database/tree/main/vulns/scrapy/PYSEC-2021-363.yaml
- collector/nvd-index
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/weakness
- agent/title
- agent/severity
- agent/description
- agent/first-publish-date
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-jwqp-28gf-p498
- alias/CVE-2021-41125
- agent/software-canonical-lookup
- agent/references
- agent/softwarecombine
- agent/event
- collector/github-advisory
- agent/last-modified-date
- agent/author
- agent/trending
- agent/source
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-cve
- vendor/scrapy
- canonical/scrapy scrapy
- version/scrapy scrapy/2.0.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- package-manager/pip
- canonical/debian
- version/debian/9.0