CVE-2024-8076 in AC1200 T8
Summary
by MITRE • 08/22/2024
A vulnerability was found in TOTOLINK AC1200 T8 4.1.5cu.862_B20230228 and classified as critical. Affected by this issue is the function setDiagnosisCfg. The manipulation leads to buffer overflow. The attack may be launched remotely. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 12/13/2024
The vulnerability identified as CVE-2024-8076 represents a critical buffer overflow flaw in the TOTOLINK AC1200 T8 router firmware version 4.1.5cu.862_B20230228. This issue resides within the setDiagnosisCfg function, which appears to handle diagnostic configuration parameters for the device. The buffer overflow vulnerability occurs when the router processes malformed input data through this specific function, creating an opportunity for arbitrary code execution or system compromise. The affected device operates under a web-based management interface that exposes this vulnerable function to external network access, making the vulnerability remotely exploitable without authentication requirements.
The technical nature of this vulnerability aligns with CWE-121, which describes buffer overflow conditions where insufficient bounds checking allows data to overwrite adjacent memory locations. This particular implementation flaw suggests inadequate input validation within the setDiagnosisCfg function, where user-supplied parameters are directly copied into fixed-size buffers without proper size verification. The attack vector is particularly concerning as it operates over the network without requiring any form of authentication, enabling remote exploitation by attackers who can craft malicious payloads to trigger the buffer overflow condition.
From an operational perspective, this vulnerability presents significant risk to network security as it allows remote attackers to potentially execute arbitrary code on the affected router. The implications extend beyond simple device compromise to include complete network infiltration, as routers serve as critical network infrastructure points. Attackers could leverage this vulnerability to establish persistent access, redirect traffic, or use the compromised device as a launch point for further attacks against internal network segments. The lack of vendor response to disclosure efforts compounds the risk, as organizations cannot expect timely patches or updates to address this critical flaw.
Security professionals should consider this vulnerability in the context of the MITRE ATT&CK framework, specifically mapping it to techniques such as T1059 for command and scripting interpreter execution and T1566 for credential access through network infrastructure compromise. The vulnerability's classification as critical indicates it should be prioritized for immediate remediation, though the vendor's lack of response suggests organizations may need to implement network-level mitigations or consider device replacement. Recommended mitigation strategies include network segmentation to isolate affected devices, implementing firewall rules to restrict access to router management interfaces, and monitoring for unusual network traffic patterns that might indicate exploitation attempts. Organizations should also consider conducting comprehensive network assessments to identify other potentially vulnerable devices running similar firmware versions, as this vulnerability may represent a broader class of issues within the TOTOLINK product line.