Overview
The vulnerability, CVE-2025-36887, is a potentially serious security flaw that resides in the wl_cfgscan_update_v3_schedscan_results() function of wl_cfgscan.c. It could potentially allow an attacker to escalate local privileges due to an incorrect bounds check, leading to an out of bounds write. It is critical because it allows system compromise or data leakage without the need for any additional user interaction, making it a stealthy and dangerous threat.
Vulnerability Summary
CVE ID: CVE-2025-36887
Severity: High (7.8 CVSS Score)
Attack Vector: Local
Privileges Required: None
User Interaction: None
Impact: Local Privilege Escalation leading to potential system compromise or data leakage
Affected Products
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Product | Affected Versions
wl_cfgscan.c | All versions prior to the vendor patch
How the Exploit Works
The vulnerability stems from an incorrect bounds check in the wl_cfgscan_update_v3_schedscan_results() function of wl_cfgscan.c. The faulty bounds check allows an out of bounds write to occur, which can be exploited to escalate local privileges. An attacker could leverage this flaw to gain elevated privileges on the system, potentially leading to full system compromise or data leakage.
Conceptual Example Code
This is an example shell command that a local attacker might use to exploit the vulnerability. Note that the real exploit would involve much more complex code, and this is just a conceptual illustration:
$ echo 'malicious_payload' > /path/to/vulnerable/wl_cfgscan.cThis command writes a malicious payload to the vulnerable wl_cfgscan.c file, exploiting the incorrect bounds check to trigger an out of bounds write, and potentially escalating the attacker’s privileges on the system.
Please note that this is a conceptual example and the actual exploit may vary depending upon the attacker’s skill, the system’s configuration and the nature of the malicious payload.