CVE-2024-3698: House Rental Management System SQLi Flaw

CVE-2024-3698 Overview

CVE-2024-3698 is a SQL injection vulnerability in Campcodes House Rental Management System 1.0. The flaw resides in the manage_payment.php script, where the id parameter passes unsanitized input directly into a database query. Authenticated attackers can manipulate the parameter to inject arbitrary SQL statements over the network. The vulnerability tracks to CWE-89 and was assigned VulDB identifier VDB-260485. Public disclosure includes a proof-of-concept report, increasing the likelihood of opportunistic exploitation against exposed instances.

Critical Impact
Remote attackers with low-privilege access can extract, modify, or destroy the underlying database, compromising tenant records, payment data, and application integrity.

Affected Products

Campcodes House Rental Management System 1.0
manage_payment.php endpoint (id parameter)
Deployments using the vulnerable PHP/MySQL backend without input sanitization

Discovery Timeline

2024-04-12 - CVE-2024-3698 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-3698

Vulnerability Analysis

The vulnerability exists in manage_payment.php, a server-side PHP script that handles payment record management. The script accepts an id value from the HTTP request and concatenates it into a SQL query without parameterization or input validation. An attacker supplying crafted SQL syntax through the id argument alters the query's logic, allowing arbitrary read and write operations against the backend database.

Successful exploitation grants access to sensitive tenant information, payment histories, and administrative credentials stored in the database. Attackers can also leverage the injection to escalate access by inserting or modifying user records. The attack requires only low-privilege authentication and no user interaction, making automated exploitation feasible against internet-facing deployments.

Root Cause

The root cause is improper neutralization of special elements used in a SQL command [CWE-89]. The application constructs SQL statements through direct string concatenation of the id parameter rather than using prepared statements or parameterized queries. No input sanitization, type casting, or allowlist validation is applied before the value reaches the database driver.

Attack Vector

The attack is delivered over the network against the manage_payment.php endpoint. An authenticated attacker submits a modified id parameter containing SQL metacharacters and injected clauses. Public disclosure of the technique lowers the barrier to exploitation, and the payload can be delivered through standard HTTP request tampering with tools such as sqlmap or manual browser-based manipulation.

The vulnerability manifests when the injected id value reaches the database layer unescaped. Refer to the GitHub vulnerability report and VulDB entry #260485 for the disclosed proof-of-concept details.

Detection Methods for CVE-2024-3698

Indicators of Compromise

HTTP requests to manage_payment.php containing SQL syntax in the id parameter such as UNION SELECT, OR 1=1, SLEEP(, or comment sequences like -- and #
Web server access logs showing unusually long id values or URL-encoded quote characters (%27, %22) targeting the endpoint
Database error messages referencing malformed queries originating from the payment management module
Unexpected new administrative accounts or modified payment records in the application database

Detection Strategies

Deploy a web application firewall (WAF) rule set that inspects query strings and POST bodies to manage_payment.php for SQL injection signatures
Enable database query logging and alert on queries that reference the payments table with tautologies or stacked statements
Correlate authenticated session activity with anomalous request patterns targeting the vulnerable endpoint

Monitoring Recommendations

Monitor outbound connections from the web server host that could indicate data exfiltration following successful injection
Track failed login events followed by rapid parameterized requests to manage_payment.php from the same source IP
Baseline normal request volumes to payment management endpoints and alert on deviations

How to Mitigate CVE-2024-3698

Immediate Actions Required

Restrict network access to the House Rental Management System application, placing it behind a VPN or IP allowlist until a fix is in place
Rotate all application and database credentials, particularly for accounts with access to manage_payment.php
Audit the payments and user tables for unauthorized entries or modifications since the application was deployed

Patch Information

No vendor patch is listed in the NVD entry or referenced advisories at the time of publication. Operators should track the VulDB record and Campcodes distribution channels for updates. Until an official fix is available, apply the code-level mitigations below by refactoring manage_payment.php to use parameterized queries via PDO or MySQLi prepared statements.

Workarounds

Replace concatenated SQL in manage_payment.php with prepared statements and bound parameters, and enforce integer type casting on the id value
Deploy WAF signatures that block SQL injection patterns targeting the id parameter on the payment endpoint
Remove or disable the manage_payment.php module if it is not required for business operations
Apply least-privilege database roles so the application account cannot execute schema changes or read unrelated tables

bash

# Example WAF rule (ModSecurity) blocking SQLi payloads against manage_payment.php
SecRule REQUEST_URI "@contains manage_payment.php" \
  "phase:2,chain,deny,status:403,id:1003698,\
   msg:'CVE-2024-3698 SQLi attempt on manage_payment.php'"
  SecRule ARGS:id "@rx (?i)(union(\s|/\*.*\*/)+select|or\s+1=1|sleep\s*\(|--|#|;)" \
    "t:none,t:urlDecodeUni"