Bug 2012126 (CVE-2021-41125)

Summary:	CVE-2021-41125 python-scrapy: information disclosure when using `HttpAuthMiddleware`
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	echevemaster
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Last Closed:	2021-10-08 14:08:24 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2012127
Bug Blocks:

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`.


References:

https://github.com/scrapy/scrapy/commit/b01d69a1bf48060daec8f751368622352d8b85a6
https://github.com/scrapy/scrapy/security/advisories/GHSA-jwqp-28gf-p498

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.