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CVE-2016-4423

Published: 1 June 2016

The attemptAuthentication function in Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php in Symfony before 2.3.41, 2.7.x before 2.7.13, 2.8.x before 2.8.6, and 3.0.x before 3.0.6 does not limit the length of a username stored in a session, which allows remote attackers to cause a denial of service (session storage consumption) via a series of authentication attempts with long, non-existent usernames.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
symfony
Launchpad, Ubuntu, Debian
impish Not vulnerable
(3.4.15+dfsg-2ubuntu4)
groovy Not vulnerable
(3.4.15+dfsg-2ubuntu4)
jammy Not vulnerable
(3.4.15+dfsg-2ubuntu4)
xenial Needed

kinetic Not vulnerable
(3.4.15+dfsg-2ubuntu4)
artful Ignored
(end of life)
bionic Not vulnerable
(3.4.6+dfsg-1)
cosmic Not vulnerable
(3.4.15+dfsg-2ubuntu4)
disco Not vulnerable
(3.4.15+dfsg-2ubuntu4)
eoan Not vulnerable
(3.4.15+dfsg-2ubuntu4)
focal Not vulnerable
(3.4.15+dfsg-2ubuntu4)
hirsute Not vulnerable
(3.4.15+dfsg-2ubuntu4)
lunar Not vulnerable
(3.4.15+dfsg-2ubuntu4)
precise Does not exist

trusty Does not exist

upstream
Released (2.8.6+dfsg-1)
wily Ignored
(end of life)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
mantic Not vulnerable
(3.4.15+dfsg-2ubuntu4)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H