CVE-2021-41125

Description

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`.

How to fix CVE-2021-41125

To remediate CVE-2021-41125, upgrade the affected package to a fixed version below.

• —upgrade to 2.4.1-2+deb11u1 or later
• —upgrade to 1.0.3-2+deb9u1 or later
• —upgrade to 1.8.1 or later
• —upgrade to b01d69a1bf48060daec8f751368622352d8b85a6 or later

Is CVE-2021-41125 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

• from 0, < 2.4.1-2+deb11u1
• from 0, < 1.0.3-2+deb9u1
• from 0, < 1.8.1
• from 0, < b01d69a1bf48060daec8f751368622352d8b85a6 | from 0, < 1.8.1, >= 2.0.0, < 2.5.1

CVSS scores

References (9)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-41125
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-41125
• PATCHgithub.com/scrapy/scrapy
• WEBdoc.scrapy.org/en/latest/topics/downloader-middleware.html#module-scrapy.downloadermiddlewares.httpauth