CVE-2016-4423 - CVE House
Back to Database
Status published High CVE-2016-4423

The attemptAuthentication function in Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php in Symfony before 2.3.41, 2.7.x...

Vulnerability 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 Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2016-4423

Credits & Attribution

No credits recorded in the NVD database.

References

More from sensiolabs

View All →
CVE-2019-18889
An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0...
Critical 9.8
CVE-2019-18888
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0...
High 7.5
CVE-2019-18887
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0...
High 8.1
CVE-2019-18886
An issue was discovered in Symfony 4.2.0 to 4.2.11 and...
Medium 5.3
CVE-2019-11325
An issue was discovered in Symfony before 4.2.12 and 4.3.x...
Critical 9.8

Affected Vendor

Affected Software

symfony, debian linux
Vulnerable Versions:
0, 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5, 2.7.6, 2.7.7, 2.7.8, 2.7.9, 2.7.10, 2.7.11, 2.7.12, 2.8.0, 2.8.1, 2.8.2, 2.8.3, 2.8.4, 2.8.5, 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 8.0

Timeline

Official Publish: June 1st, 2016
Last Modified: August 6th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.