CVE-2024-39370
Published: 14 January 2025
Summary
CVE-2024-39370 is a critical-severity Classic Buffer Overflow (CWE-120) 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 30.4% 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-2 (Flaw Remediation).
Deeper analysis
CVE-2024-39370 is an arbitrary code execution vulnerability in the adm.cgi set_MeshAp() functionality of the Wavlink AC3000 router running firmware version M33A8.V5030.210505. The flaw arises from a specially crafted HTTP request that can lead to arbitrary code execution, classified under CWE-120 (Buffer Copy without Checking Size of Input). It carries a CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H), indicating critical severity due to its potential for high-impact effects across confidentiality, integrity, and availability.
An attacker requires high privileges (PR:H) to exploit this vulnerability via an authenticated HTTP request to the affected component. Successful exploitation enables arbitrary code execution on the device, with network vector (AV:N), low complexity (AC:L), no user interaction (UI:N), and scope change (S:C), allowing full compromise of the router's security.
Mitigation details are available in the Talos Intelligence advisory TALOS-2024-2031 at https://talosintelligence.com/vulnerability_reports/TALOS-2024-2031. Security practitioners should consult this report for recommended patches or workarounds specific to the Wavlink AC3000 firmware.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-38367
Vulnerability details
An arbitrary code execution vulnerability exists in the adm.cgi set_MeshAp() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to arbitrary code 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?
Buffer overflow in router web CGI (adm.cgi) enables RCE via crafted authenticated HTTP request to public-facing interface.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly remediates the buffer overflow flaw in adm.cgi set_MeshAp() through firmware patching or updates as recommended in the vendor advisory.
Validates specially crafted HTTP request inputs to adm.cgi set_MeshAp(), preventing buffer copy without size checking that leads to arbitrary code execution.
Implements memory safeguards such as stack canaries or DEP to protect against unauthorized code execution from the buffer overflow vulnerability.