Bug 2012126 (CVE-2021-41125) - CVE-2021-41125 python-scrapy: information disclosure when using `HttpAuthMiddleware`
Summary: CVE-2021-41125 python-scrapy: information disclosure when using `HttpAuthMidd...
Alias: CVE-2021-41125
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2012127
TreeView+ depends on / blocked
Reported: 2021-10-08 10:59 UTC by Michael Kaplan
Modified: 2021-10-08 14:08 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed: 2021-10-08 14:08:24 UTC

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Description Michael Kaplan 2021-10-08 10:59:47 UTC
A vulnerability was discovered in python-scrapy. 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`.



Comment 1 Michael Kaplan 2021-10-08 11:00:00 UTC
Created python-scrapy tracking bugs for this issue:

Affects: fedora-all [bug 2012127]

Comment 2 Product Security DevOps Team 2021-10-08 14:08:24 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

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