CVE-2024-1750 in TemmokuMVC
Summary
by MITRE • 02/22/2024
A vulnerability, which was classified as critical, was found in TemmokuMVC up to 2.3. Affected is the function get_img_url/img_replace in the library lib/images_get_down.php of the component Image Download Handler. The manipulation leads to deserialization. It is possible to launch the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-254532. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 12/31/2024
The vulnerability identified as CVE-2024-1750 represents a critical security flaw in TemmokuMVC version 2.3 and earlier, specifically within the Image Download Handler component. This issue resides in the lib/images_get_down.php library where the get_img_url and img_replace functions process image-related data. The vulnerability stems from improper input validation and unsafe deserialization practices that allow malicious actors to manipulate the system's image processing functionality. The flaw manifests when user-supplied data is directly processed through deserialization routines without adequate sanitization, creating a potential attack vector for remote exploitation.
The technical implementation of this vulnerability falls under CWE-502, which categorizes deserialization of untrusted data as a critical security concern. When an attacker can influence the deserialization process, they can inject malicious objects that execute arbitrary code upon processing. The attack complexity is rated as high due to the need for precise payload construction and the requirement to understand the specific deserialization mechanism within the application. The vulnerability's exploitability difficulty rating reflects the sophisticated nature of the attack vector, which requires careful crafting of serialized data that can be safely processed by the vulnerable system. This classification aligns with ATT&CK technique T1203, which covers exploitation for privilege escalation through deserialization attacks.
Remote exploitation of this vulnerability is possible, indicating that attackers can leverage the flaw from outside the local network without requiring physical access or prior authentication. The public disclosure of the exploit (VDB-254532) significantly increases the risk to affected systems, as malicious actors can readily implement the attack without requiring advanced technical skills. The lack of vendor response to early disclosure attempts creates an urgent security concern, as organizations using affected versions of TemmokuMVC cannot rely on official patches or updates. The image download handler component specifically processes external image references, making it a prime target for attackers seeking to execute arbitrary code through manipulated image URLs or metadata.
The operational impact of this vulnerability extends beyond simple code execution to potentially compromise entire application environments. Successful exploitation could allow attackers to gain unauthorized access to system resources, escalate privileges, or establish persistent backdoors within the affected systems. The deserialization flaw creates a pathway for attackers to bypass traditional security controls and potentially move laterally within network environments. Organizations running affected versions should immediately implement mitigations including input validation, disabling unnecessary deserialization functionality, and network segmentation to limit potential attack surface. The vulnerability demonstrates the critical importance of secure coding practices and proper input sanitization, particularly when handling user-supplied data in web applications.