7.5
HIGH
CVE-2016-4423
Symfony UsernamePasswordFormAuthenticationListener Session Username Dos
Description

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.

INFO

Published Date :

June 1, 2016, 10:59 p.m.

Last Modified :

June 3, 2016, 2:50 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2016-4423 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Debian debian_linux
1 Sensiolabs symfony
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2016-4423.

URL Resource
http://www.debian.org/security/2016/dsa-3588
https://github.com/symfony/symfony/pull/18733
https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-4423 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2016-4423 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Jun. 03, 2016

    Action Type Old Value New Value
    Added CPE Configuration Configuration 1 OR *cpe:2.3:a:sensiolabs:symfony:3.0.5:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:3.0.4:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:3.0.3:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:3.0.2:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:3.0.1:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:3.0.0:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.8.5:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.8.4:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.8.3:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.8.2:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.8.1:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.8.0:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.0:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.1:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.2:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.3:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.4:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.5:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.6:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.7:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.8:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.9:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.10:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.11:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.7.12:*:*:*:*:*:*:* *cpe:2.3:a:sensiolabs:symfony:2.3.40:*:*:*:*:*:*:* (and previous) Configuration 2 OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
    Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session No Types Assigned https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session Advisory
    Added CWE CWE-399
  • Initial Analysis by [email protected]

    Jun. 02, 2016

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-4423 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2016-4423 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

1.04 }} 0.00%

score

0.81684

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability