Bug 1960630 (CVE-2021-21424) - CVE-2021-21424 php-symfony: user enumeration in authentication mechanisms
Summary: CVE-2021-21424 php-symfony: user enumeration in authentication mechanisms
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-21424
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1960631 1960632
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-05-14 12:47 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-05-14 14:33 UTC (History)
3 users (show)

Fixed In Version:
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Clone Of:
Environment:
Last Closed: 2021-05-14 14:33:56 UTC
Embargoed:


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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.


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