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CVE-2023-33112: Transient Denial of Service (DOS) Vulnerability in WLAN Firmware

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Overview

This report discusses the vulnerability identified as CVE-2023-33112, a significant security flaw affecting WLAN firmware. This vulnerability is triggered when the firmware receives a “reassoc response” frame that includes a RIC_DATA element, leading to a transient Denial of Service (DOS). Cybersecurity professionals, WLAN firmware manufacturers, and organizations that rely on wireless networks should be aware of this vulnerability due to the potential system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2023-33112
Severity: High (CVSS 7.5)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

WLAN Firmware | All prior versions to patch

How the Exploit Works

The exploit works by an attacker sending a “reassoc response” frame including a maliciously crafted RIC_DATA element to the target WLAN firmware. When the firmware attempts to process this frame, it leads to a transient DOS condition, causing system instability or temporary unavailability. This condition might allow a skilled attacker to compromise the system or leak sensitive data.

Conceptual Example Code

While the specific details of exploiting this vulnerability are not public, a conceptual example might look something like this:

# Send a maliciously crafted "reassoc response" frame to the target
echo -e "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" | nc -u target.example.com 12345

This command uses echo to send a binary string (representing a malformed “reassoc response” frame) to the target system over UDP (port 12345). Note that this is a conceptual example and the real-world exploit would likely require a more sophisticated approach.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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