CVE-2016-4423
Summary
| CVE | CVE-2016-4423 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-06-01 22:59:02 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.0 7.5 HIGH from [email protected]
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-399 | n/a
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Debian | Debian Linux | 8.0 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.0 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.1 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.10 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.11 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.12 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.2 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.3 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.4 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.5 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.6 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.7 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.8 | All | All | All |
| Application | Sensiolabs | Symfony | 2.7.9 | All | All | All |
| Application | Sensiolabs | Symfony | 2.8.0 | All | All | All |
| Application | Sensiolabs | Symfony | 2.8.1 | All | All | All |
| Application | Sensiolabs | Symfony | 2.8.2 | All | All | All |
| Application | Sensiolabs | Symfony | 2.8.3 | All | All | All |
| Application | Sensiolabs | Symfony | 2.8.4 | All | All | All |
| Application | Sensiolabs | Symfony | 2.8.5 | All | All | All |
| Application | Sensiolabs | Symfony | 3.0.0 | All | All | All |
| Application | Sensiolabs | Symfony | 3.0.1 | All | All | All |
| Application | Sensiolabs | Symfony | 3.0.2 | All | All | All |
| Application | Sensiolabs | Symfony | 3.0.3 | All | All | All |
| Application | Sensiolabs | Symfony | 3.0.4 | All | All | All |
| Application | Sensiolabs | Symfony | 3.0.5 | All | All | All |
| Application | Sensiolabs | Symfony | All | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| limited the maximum length of a submitted username by fabpot · Pull Request #18733 · symfony/symfony · GitHub | af854a3a-2127-422b-91ae-364da2661108 | github.com | |
| CVE-2016-4423: Large username storage in session (Symfony Blog) | af854a3a-2127-422b-91ae-364da2661108 | symfony.com | Vendor Advisory |
| Debian -- Security Information -- DSA-3588-1 symfony | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.