CVE-2021-41125
What it is
Scrapy is a high-level web crawling and scraping framework for Python. If you use `HttpAuthMiddleware` (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. 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. If you cannot upgrade, set your HTTP authentication credentials on a per-request basis, using for example the `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`.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data exposure.
- Exploit odds
- 1.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.3% in the next 30 days (EPSS).
- Severity: 5.7 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.3% · EPSS, next 30 days
- Weakness
- CWE-200 · Information exposure
- Record status
- Modified
Affected
- Scrapy < 1.8.1
- Scrapy < 2.5.1
- Debian Linux 9.0
Attack profile CVSS 3.1 · 5.7
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-41125.md and follow it. Check whether this project is affected by CVE-2021-41125. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- 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
- 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
References
- 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
- 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