CVE-2026-12357 in Database Proxy
Summary
by MITRE • 07/29/2026
Heimdall Data Database Proxy generateFileContent CRLF Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Heimdall Data Database Proxy. Authentication is required to exploit this vulnerability.
The specific flaw exists within the generateFileContent function. The issue results from the lack of proper neutralization of CRLF sequences. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-29251.
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Analysis
by VulDB Data Team • 07/30/2026
The Heimdall Data Database Proxy contains a critical remote code execution vulnerability originating from improper handling of carriage return line feed sequences within its generateFileContent function. This weakness represents a classic CRLF injection flaw that enables attackers to manipulate input processing mechanisms and execute arbitrary commands on the target system. The vulnerability requires authentication to exploit, meaning that an authenticated attacker with access to the proxy interface can leverage this issue to gain elevated privileges and potentially compromise the entire system. The root cause stems from insufficient validation and sanitization of user-supplied input data before it is processed by the application's file generation mechanisms.
The technical implementation of this vulnerability occurs when the generateFileContent function fails to properly neutralize or escape CRLF characters within user-controllable parameters. When an attacker submits malicious input containing carriage return and line feed sequences, these characters can be interpreted by the underlying system as command separators rather than data inputs. This allows the injection of additional commands that execute in the context of the application process, which typically runs with elevated privileges. The vulnerability specifically targets how the proxy handles file content generation, suggesting that legitimate functionality involving file operations becomes a vector for malicious input manipulation.
The operational impact of this vulnerability extends beyond simple code execution to potentially compromise entire database infrastructure and sensitive data repositories managed by the Heimdall proxy. Since the attack can be executed in the context of root privileges, an attacker could gain complete control over system resources, modify or delete critical files, establish persistence mechanisms, and access confidential database information. The remote nature of this exploit means that attackers do not need physical access to the system, making it particularly dangerous for organizations with exposed proxy services. This vulnerability directly aligns with CWE-113, which describes improper neutralization of CRLF characters in web applications.
Security mitigations for this vulnerability should focus on implementing strict input validation and sanitization procedures before any user data enters the file generation pipeline. Organizations must ensure that all CRLF sequences are properly escaped or removed from input parameters prior to processing, particularly when these inputs are used in system commands or file operations. The implementation of parameterized queries and secure coding practices can prevent this type of injection attack by separating execution logic from data input. Additionally, network segmentation and access controls should limit authentication exposure to reduce the attack surface. This vulnerability demonstrates the importance of following established security frameworks such as those defined in the ATT&CK matrix under command and control categories, where CRLF injection represents a well-documented technique for achieving remote code execution through application layer vulnerabilities.
The ZDI-CAN-29251 identifier confirms this vulnerability has been formally recognized by the Zero Day Initiative, indicating its significance within the cybersecurity community. This vulnerability type typically requires immediate remediation as it provides attackers with a direct path to system compromise without requiring advanced exploitation techniques. Organizations should prioritize patching or implementing compensating controls while monitoring for potential exploitation attempts in their network logs and security information event management systems.