Overview
CVE-2025-13654 describes a stack buffer overflow vulnerability found in DUC, a disk management tool. Specifically, the vulnerability resides within the buffer_get function. An underflow condition can lead to an out-of-bounds read, ultimately triggering the stack buffer overflow. This can potentially allow an attacker to execute arbitrary code or cause a denial-of-service (DoS).
Technical Details
The vulnerability in DUC arises due to an integer underflow within the buffer_get function. This underflow causes a condition to evaluate to true unexpectedly, leading to an out-of-bounds read. Because this read writes to a stack buffer, it allows writing beyond the buffer’s boundaries, corrupting program memory and potentially leading to code execution. The specific code area in buffer_get vulnerable to the underflow needs careful inspection to fully understand the exploitability. Exploitation would likely involve crafting specific input that triggers the underflow and carefully overwrites the stack with malicious code.
Here’s a simplified example illustrating the underflow concept (note: this is a conceptual example and might not be the exact code):
int buffer_get(char *buffer, int len, int offset) {
// Simplified example demonstrating potential underflow
if (offset < 0) {
return -1; // Error
}
int read_length = len - offset; // Possible integer underflow if offset is larger than len
if (read_length < 0) {
// Code that triggers the out-of-bounds read due to the underflow
// ... Access buffer outside of its bounds.
}
}
CVSS Analysis
Currently, no CVSS score is available for CVE-2025-13654. However, due to the nature of a stack buffer overflow which could lead to code execution, a CVSS score ranging from High to Critical would be appropriate, depending on the ease of exploitation and the privileges of the DUC process. Further analysis is required to determine a more accurate CVSS score based on the attack vector, attack complexity, privileges required, user interaction, scope, confidentiality impact, integrity impact, and availability impact.
Possible Impact
The impact of CVE-2025-13654 can be significant:
- Remote Code Execution (RCE): A successful exploit could allow an attacker to execute arbitrary code on the affected system with the privileges of the DUC process.
- Denial of Service (DoS): Even without achieving code execution, the overflow can crash the DUC application, leading to a denial of service.
- Information Disclosure: The overflow could potentially be leveraged to leak sensitive information from the process memory.
Mitigation and Patch Steps
The primary mitigation is to upgrade to DUC version 1.4.6 or later. This version contains a fix that addresses the stack buffer overflow vulnerability. If upgrading is not immediately possible, consider the following temporary measures (though these are less effective than patching):
- Input Validation: Carefully validate any input provided to the DUC tool, especially when processing potentially untrusted data. Restrict the size and format of inputs.
- Network Segmentation: If DUC is used in a networked environment, segment the network to limit the potential spread of an exploit.
Users are strongly advised to apply the official patch as soon as possible to remediate this vulnerability.
