Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2016-4423

Severity CVSS v4.0:
Pending analysis
Type:
CWE-399 Resource Management Errors
Publication date:
01/06/2016
Last modified:
12/04/2025

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.

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* 2.3.40 (including)
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:2.8.0:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools