Bug 1960630 (CVE-2021-21424)

Summary:	CVE-2021-21424 php-symfony: user enumeration in authentication mechanisms
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	fedora, james.hogarth, shawn
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-14 14:33:56 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1960631, 1960632
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2021-05-14 12:47:33 UTC

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether the user existed or not when attempting to use the switch users functionality. We now ensure that 403s are returned whether the user exists or not if a user cannot switch to a user or if the user does not exist. The patch for this issue is available for branch 3.4.

Reference:
https://github.com/symfony/symfony/security/advisories/GHSA-5pv8-ppvj-4h68

Upstream patch:
https://github.com/symfony/symfony/commit/2a581d22cc621b33d5464ed65c4bc2057f72f011

Comment 1 Guilherme de Almeida Suckevicz 2021-05-14 12:48:00 UTC

Created php-symfony tracking bugs for this issue:

Affects: epel-7 [bug 1960632]
Affects: fedora-all [bug 1960631]

Comment 2 Product Security DevOps Team 2021-05-14 14:33:56 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.