Overview
CVE-2025-11789 is a reported out-of-bounds read vulnerability affecting Circutor SGE-PLC1000 and SGE-PLC50 devices running firmware version 9.0.2. This vulnerability could potentially allow an attacker to read sensitive information from the device’s memory, leading to further exploitation or system compromise.
Technical Details
The vulnerability resides within the DownloadFile function. This function processes a parameter which it converts to an integer using the atoi() function. The resulting integer is then used as an index (iVar2) into the FilesDownload array via the expression (&FilesDownload)[iVar2].
The critical flaw lies in the lack of proper bounds checking. If the parameter passed to atoi() is sufficiently large, the resulting integer iVar2 can exceed the bounds of the FilesDownload array. This leads to an out-of-bounds read, where the device attempts to access memory locations outside of the allocated array.
CVSS Analysis
Currently, the CVSS score and severity for CVE-2025-11789 are marked as N/A. This likely indicates that the vulnerability is newly discovered or is still undergoing assessment. However, given the potential for sensitive information disclosure via out-of-bounds read, a thorough evaluation and timely patching are crucial.
Possible Impact
The exploitation of this vulnerability could lead to several severe consequences:
- Information Disclosure: Attackers could read sensitive data stored in memory, potentially including configuration files, passwords, or other confidential information.
- Denial of Service (DoS): Repeated or targeted out-of-bounds reads could cause the device to crash or become unresponsive.
- Code Execution (Potential): While currently reported as an out-of-bounds read, successful exploitation could potentially be chained with other vulnerabilities to achieve arbitrary code execution on the device.
- Lateral Movement: Compromised devices could be used as a stepping stone to attack other systems on the network.
Mitigation and Patch Steps
At this time, specific patch information may not be readily available. The following steps are recommended to mitigate the risk:
- Monitor Circutor’s official website and security advisories for updates and patches.
- Contact Circutor support directly to inquire about the availability of a fix.
- Implement network segmentation to isolate vulnerable devices from the rest of the network.
- Apply access control lists (ACLs) to restrict access to the affected devices.
- Monitor network traffic for suspicious activity targeting these devices.
Applying a patch released by Circutor is the definitive solution to address this vulnerability. Once available, apply the patch promptly according to the vendor’s instructions.
References
INCIBE-CERT Advisory: Multiple vulnerabilities in Circutor products
