CVE-2024-39799
Published: 14 January 2025
Summary
CVE-2024-39799 is a critical-severity External Control of System or Configuration Setting (CWE-15) 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 34.5% 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-2024-39799 involves multiple external control of configuration vulnerabilities in the openvpn.cgi openvpn_server_setup() functionality of the Wavlink AC3000 router running firmware version M33A8.V5030.210505. A specially crafted HTTP request can lead to arbitrary command execution. The vulnerabilities are classified under CWE-15 and include a configuration injection issue in the `sel_open_interface` POST parameter.
Exploitation requires an authenticated attacker with high privileges (PR:H) to send a malicious HTTP request over the network (AV:N). Successful exploitation enables arbitrary command execution on the device, with a CVSS v3.1 base score of 9.1 (AC:L/UI:N/S:C/C:H/I:H/A:H), indicating low attack complexity, no user interaction, scope change, and high impact on confidentiality, integrity, and availability.
Mitigation details and additional technical analysis are available in the Talos Intelligence advisory at https://talosintelligence.com/vulnerability_reports/TALOS-2024-2050.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-38343
Vulnerability details
Multiple external config control vulnerabilities exists in the openvpn.cgi openvpn_server_setup() 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 these vulnerabilities.A configuration injection…
more
vulnerability exists in the `sel_open_interface` POST parameter.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE describes a remote authenticated command injection vulnerability in a router's public-facing web CGI endpoint (openvpn.cgi), directly enabling exploitation of a public-facing application for arbitrary command execution.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly validates specially crafted inputs like the sel_open_interface POST parameter to prevent configuration injection and arbitrary command execution in openvpn.cgi.
Remediates the specific flaw in the openvpn_server_setup() function to eliminate the external control of configuration vulnerability.
Enforces least privilege to limit high-privilege authenticated access required to exploit the vulnerable HTTP endpoint.