Overview
The CVE-2025-20682 is a critical vulnerability found in the WLAN AP driver that could potentially allow a local user to escalate their privileges through an out-of-bounds write. With a CVSS score of 9.8, this vulnerability signifies a serious threat to system integrity and data security. Affected systems run the risk of being compromised, leading to potential data leakage. The vulnerability is particularly dangerous due to its ability to be exploited without any user interaction, which underscores the need for immediate attention and mitigation.
Vulnerability Summary
CVE ID: CVE-2025-20682
Severity: Critical (CVSS Score: 9.8)
Attack Vector: Local
Privileges Required: User
User Interaction: None
Impact: System Compromise and Potential Data Leakage
Affected Products
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Product | Affected Versions
WLAN AP Driver | All prior versions to the patch
How the Exploit Works
The vulnerability resides in the WLAN AP driver, where an incorrect bounds check may lead to an out-of-bounds write. This error could be exploited by a malicious user already inside the system to escalate their privileges without any required interaction from other users. This privilege escalation could potentially lead to a full system compromise, including data leakage.
Conceptual Example Code
While it’s impossible to provide an exact exploit without risk of misuse, we can conceptually understand how a potential exploit might look. When bounds checking is not properly implemented, a malicious user can inject code that might look something like this:
$ echo "malicious_code" > /dev/wlan0In this conceptual example, the “malicious_code” is written directly to the device driver file, potentially leading to an overflow due to incorrect bounds checking.
Mitigation and Prevention
The best course of action to prevent exploitation of this vulnerability is to apply the vendor-supplied patch, identified as Patch ID: WCNCR00416937. For temporary mitigation, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) may help detect and prevent attempts to exploit this vulnerability. Regular patching and security reviews are integral to maintaining a secure system environment and preventing future vulnerabilities.