Bug 1340833 (CVE-2016-4423) - CVE-2016-4423 php-symfony: Large username storage in session
Summary: CVE-2016-4423 php-symfony: Large username storage in session
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-4423
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: 1340834 1340835
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-05-30 11:30 UTC by Andrej Nemec
Modified: 2021-02-17 03:48 UTC (History)
4 users (show)

Fixed In Version: php-symfony 2.7.13, php-symfony 2.3.41
Clone Of:
Environment:
Last Closed: 2017-01-02 08:15:35 UTC
Embargoed:

Attachments (Terms of Use)

Description Andrej Nemec 2016-05-30 11:30:00 UTC 
When an authentication form is submitted by the user and if the user does not exist, the submitted username is stored in the session. If an attacker submit multiple requests with large usernames, he can potentially fill up the session storage.

External references:

https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session
Comment 1 Andrej Nemec 2016-05-30 11:30:26 UTC 
Created php-symfony tracking bugs for this issue:

Affects: epel-all [bug 1340834]
Affects: fedora-all [bug 1340835]
Comment 2 Shawn Iwinski 2016-12-28 22:01:21 UTC 
All dependent bugs closed.
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