CVE-2024-39794
Published: 14 January 2025
Summary
CVE-2024-39794 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 at the 20.0th percentile by exploit likelihood (below the median); 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 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2024-39794 involves multiple external configuration control vulnerabilities in the nas.cgi set_nas() proftpd functionality of the Wavlink AC3000 router running firmware version M33A8.V5030.210505. These flaws enable a permission bypass through a specially crafted HTTP request and include a configuration injection vulnerability in the `ftp_port` POST parameter. Published on January 14, 2025, the vulnerability is rated with 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) and is associated with CWE-15 (External Control of File Name or Path).
Exploitation requires an authenticated attacker with high privileges (PR:H) to send a specially crafted HTTP request over the network (AV:N). The low attack complexity (AC:L) and lack of user interaction (UI:N) allow the attacker to bypass permissions and inject configurations, resulting in high impacts to confidentiality, integrity, and availability (C:H/I:H/A:H), compounded by a change in scope (S:C).
Details on the vulnerabilities, including potential mitigations, are provided in the Talos Intelligence advisory TALOS-2024-2053, accessible at https://talosintelligence.com/vulnerability_reports/TALOS-2024-2053.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-38384
Vulnerability details
Multiple external config control vulnerabilities exist in the nas.cgi set_nas() proftpd functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to permission bypass. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.A configuration injection…
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vulnerability exists in the `ftp_port` POST parameter.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Vulnerability in router web interface (nas.cgi) allows authenticated attackers to exploit public-facing application for permission bypass and config injection into proftpd.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces approved authorizations for logical access to nas.cgi set_nas() proftpd functionality, directly preventing permission bypass via crafted HTTP requests.
Validates information inputs like the ftp_port POST parameter to block configuration injection and external control of file name or path (CWE-15).
Establishes and maintains secure baseline configuration settings for router components like nas.cgi and proftpd to mitigate external configuration control vulnerabilities.