CVE-2024-39757
Published: 14 January 2025
Summary
CVE-2024-39757 is a critical-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Wavlink Wl-Wn533A8 Firmware. Its CVSS base score is 9.1 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 35.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
A stack-based buffer overflow vulnerability, tracked as CVE-2024-39757 and associated with CWE-121, affects the wireless.cgi AddMac() functionality in the Wavlink AC3000 router running firmware version M33A8.V5030.210505. The flaw allows a specially crafted HTTP request to overflow the stack buffer, potentially leading to arbitrary command execution.
An attacker with high privileges (PR:H), such as an authenticated administrative user, can exploit this vulnerability over the network (AV:N) with low complexity (AC:L). Successful exploitation grants scope-changed (S:C) high-impact access to confidentiality, integrity, and availability (C:H/I:H/A:H), enabling full arbitrary command execution on the device.
Mitigation details are provided in the Cisco Talos Intelligence advisory at https://talosintelligence.com/vulnerability_reports/TALOS-2024-2043, which includes technical analysis and recommendations for addressing the vulnerability.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-38371
Vulnerability details
A stack-based buffer overflow vulnerability exists in the wireless.cgi AddMac() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to arbitrary command execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack buffer overflow in authenticated wireless.cgi HTTP handler directly enables remote code execution on a network-exposed router web interface.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly validates specially crafted HTTP inputs to the AddMac() function in wireless.cgi, preventing the stack buffer overflow leading to arbitrary command execution.
Remediates the specific stack-based buffer overflow flaw in Wavlink AC3000 firmware through timely identification, reporting, and patching.
Implements memory protections such as stack canaries or DEP to block arbitrary code execution even if the buffer overflow in AddMac() occurs.