CVE-2024-36611
Executive Summary
CVE-2024-36611 is a reported security vulnerability in Symfony v7.07, specifically in the FormLoginAuthenticator component. The original claim suggested that empty username or password fields could lead to improper authentication logic handling or denial of service. However, the Symfony vendor has officially concluded that this is a false report, and no patch or fix has been issued. The CVSS score is 0.0, and no exploit code or proof-of-concept has been publicly released. This report analyzes the claim, provides detection guidance for defensive teams, and outlines the vendor’s position.
This record — and 170,000+ others — are available via the ValtersIT API. One endpoint replaces five: NVD + GitHub CVE + CISA KEV + EPSS + Nuclei + Exploit-DB, unified.
No signup required
CVSS Breakdown & Threat Level
- CVSS Score: 0.0 (None)
- Vector: UNKNOWN
- Severity: None
- Rationale: The vendor has rejected the vulnerability as a false report. No evidence of exploitability or impact exists.
Deep Dive & Mechanics
The reported issue centers on Symfony’s FormLoginAuthenticator, which handles form-based login authentication. The claim states that when the username or password field is empty, the component fails to handle the case properly, potentially leading to authentication bypass or denial of service. However, Symfony’s security team reviewed the report and determined that the behavior is expected and does not constitute a security flaw. In standard Symfony authentication flows, empty credentials are rejected by the authentication system before reaching the authenticator, or are handled gracefully without security impact. No further technical details are available, and no proof-of-concept has been validated.
Vulnerable vs. Patched Code
No vulnerable or patched code comparison is available because the vendor has not acknowledged the vulnerability. The reported version is Symfony v7.07, but no patch has been released. The codebase remains unchanged.
Exploitation & Lab Setup
Red Team
No exploit code or proof-of-concept exists for this CVE. Attempting to exploit empty username/password fields in Symfony’s FormLoginAuthenticator will not yield any security bypass or denial of service, as the vendor has confirmed the behavior is safe. Red teams should focus on other validated vulnerabilities.
Blue Team
Blue teams should monitor for any unusual authentication attempts involving empty credentials, but this is not a validated threat. Standard logging and monitoring of authentication failures is sufficient. No specific detection rules are required for this CVE.
Indicators of Compromise (IOCs)
No IOCs are associated with this CVE, as it is a false report. No malicious activity has been observed.
Detection Engineering
No detection rules are necessary for this CVE. The following are placeholder examples for educational purposes only.
rule CVE_2024_36611_placeholder
{
meta:
description = "Placeholder YARA rule for CVE-2024-36611 (false report)"
author = "Valters IT"
date = "2025-01-01"
strings:
$s1 = "FormLoginAuthenticator" nocase
$s2 = "empty" nocase
condition:
all of them
}
title: Placeholder Sigma Rule for CVE-2024-36611
id: placeholder-0001
status: experimental
description: Placeholder rule for CVE-2024-36611 (false report)
logsource:
category: application
product: symfony
detection:
selection:
event: "authentication failure"
condition: selection
falsepositives:
- Normal authentication failures
level: low
# Placeholder Suricata rule for CVE-2024-36611 (false report)
alert http any any -> any any (msg:"CVE-2024-36611 Placeholder - False Report"; content:"FormLoginAuthenticator"; nocase; sid:1000001; rev:1;)
Remediation & Mitigation
No remediation is required because the vulnerability is a false report. Symfony users should continue using the latest stable version and follow official security advisories. If any future updates are released, they will be documented by the Symfony project.
Valters IT
DevSecOps & Cyber Threat Intelligence