CVE-2024-39770
Published: 14 January 2025
Summary
CVE-2024-39770 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Wavlink Wl-Wn533A8 Firmware. Its CVSS base score is 9.1 (Critical).
Operationally, ranked in the top 29.4% 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-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Information Input Validation directly prevents stack-based buffer overflows by enforcing validity checks on the en_enable POST parameter in the set_qos() function.
Memory Protection implements safeguards like stack canaries, ASLR, and DEP to mitigate exploitation of stack-based buffer overflows in internet.cgi.
Flaw Remediation requires identifying, patching, and testing fixes for the specific buffer overflow vulnerabilities in the Wavlink router firmware.
NVD Description
Multiple buffer overflow vulnerabilities exist in the internet.cgi set_qos() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to stack-based buffer overflow. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.This vulnerability exists in…
more
the `en_enable` POST parameter.
Deeper analysisAI
CVE-2024-39770 consists of multiple stack-based buffer overflow vulnerabilities (CWE-120) in the set_qos() functionality of the internet.cgi script on the Wavlink AC3000 router running firmware version M33A8.V5030.210505. These issues arise from improper handling of the `en_enable` POST parameter in specially crafted HTTP requests, potentially leading to buffer overflows.
An authenticated attacker with high privileges (PR:H) can exploit these vulnerabilities remotely over the network (AV:N) with low complexity (AC:L) and without user interaction (UI:N). By sending a malicious HTTP request, the attacker can trigger the stack-based buffer overflow, achieving high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H) across the affected scope (S:C), as reflected in the CVSS v3.1 base score of 9.1.
Mitigation guidance is available in the Talos Intelligence advisory at https://talosintelligence.com/vulnerability_reports/TALOS-2024-2022.
Details
- CWE(s)