Overview
The vulnerability CVE-2025-29971 is a critical issue present in the Web Threat Defense (WTD.sys) system. It allows an unauthorized attacker to exploit an out-of-bounds read, causing a denial of service over a network, potentially leading to system compromise or data leakage. This vulnerability affects all systems running WTD.sys, making it a significant concern for organizations and individuals alike.
Vulnerability Summary
CVE ID: CVE-2025-29971
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Denial of service, potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Web Threat Defense System | All versions prior to patch
How the Exploit Works
The exploit takes advantage of an out-of-bounds read in the WTD.sys system. An attacker sends specially crafted packets over the network to the target system. These packets trigger the out-of-bounds read, causing the WTD.sys to crash, which in turn creates a denial of service condition. In some instances, this vulnerability could also lead to potential system compromise or data leakage.
Conceptual Example Code
The below is a conceptual representation of how the vulnerability might be exploited. This pseudocode represents a malicious packet triggering the out-of-bounds read.
GET /WTD.sys/process_packet?index=-1 HTTP/1.1
Host: target.example.comThe `index=-1` in the request is an example of the kind of malicious input that could trigger an out-of-bounds read, as it is an invalid value for the packet index.
Mitigation Guidance
To mitigate the effects of this vulnerability, it is recommended to apply the vendor-provided patch as soon as possible. If applying the patch is not immediately possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation by blocking malicious packets that attempt to exploit this vulnerability.
