Overview
CVE-2025-63701 details a heap corruption vulnerability found in the Advantech TP-3250 printer driver, specifically within the DrvUI_x64_ADVANTECH.dll file (version 0.3.9200.20789). This vulnerability arises from an incorrect size assumption during the DocumentPropertiesW() function call, potentially leading to serious security consequences.
Technical Details
The vulnerability occurs when DocumentPropertiesW() is called with a valid dmDriverExtra value, but the provided output buffer is smaller than expected. The driver erroneously assumes that the size of the output buffer matches the input buffer. This incorrect assumption leads to an out-of-bounds write during memory operations, causing heap corruption. The affected DLL is DrvUI_x64_ADVANTECH.dll, version 0.3.9200.20789.
CVSS Analysis
Currently, the Common Vulnerability Scoring System (CVSS) score for CVE-2025-63701 is listed as N/A. While the exact score is unavailable, the described vulnerability has the potential for significant impact.
Possible Impact
The heap corruption vulnerability can result in several negative outcomes:
- Denial of Service (DoS): The most immediate consequence is application crashes, rendering the printer driver and potentially associated applications unusable.
- Potential Code Execution: The heap corruption might be leveraged by attackers to inject and execute arbitrary code within the context of the user space. While local access is required, this opens doors for privilege escalation and further compromise.
Mitigation or Patch Steps
Unfortunately, at this time, specific patches or official mitigation steps from Advantech are unknown. Until a patch is released, the following steps can be taken:
- Monitor Advantech’s Security Advisories: Regularly check the Advantech support website for security updates and announcements.
- Restrict Local Access: Limit access to the affected systems to only authorized personnel to reduce the risk of exploitation.
- Disable Unnecessary Printer Driver Features: Where possible, disable any non-essential printer driver features that could potentially trigger the vulnerable code path.
We will update this article as soon as official patches or mitigations are released by Advantech.
