CVE-2022-38567 in Tenda
Summary
by MITRE • 08/28/2022
Tenda M3 V1.0.0.12(4856) was discovered to contain a stack overflow vulnerability in the function formSetAdConfigInfo. This vulnerability allows attackers to cause a Denial of Service (DoS) via the authIPs parameter.
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Analysis
by VulDB Data Team • 10/09/2022
The vulnerability identified as CVE-2022-38567 represents a critical stack overflow flaw within the Tenda M3 router firmware version V1.0.0.12(4856). This issue resides in the formSetAdConfigInfo function, which processes configuration data for the device's administrative settings. The stack overflow occurs when the authIPs parameter is manipulated during the configuration process, creating a condition where attacker-controlled input can overwrite adjacent memory locations on the stack. Such vulnerabilities typically arise from insufficient input validation and bounds checking mechanisms within the firmware's code structure.
The technical exploitation of this vulnerability enables remote attackers to trigger a denial of service condition by crafting malicious payloads through the authIPs parameter. When the router processes this malformed input, the stack buffer overflow corrupts the program's execution flow, leading to a system crash or reboot. This behavior aligns with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflows occurring in stack memory regions. The vulnerability demonstrates characteristics consistent with the attack pattern described in the MITRE ATT&CK framework under T1203 - Exploitation for Privilege Escalation, where attackers leverage software flaws to gain control over system resources.
From an operational perspective, this vulnerability poses significant risks to network infrastructure security, particularly in enterprise environments where router stability is critical for continuous operations. The remote nature of the exploit means that attackers can initiate the denial of service condition without requiring physical access to the device or local network presence. The impact extends beyond simple service disruption as it can potentially be chained with other vulnerabilities to achieve more severe consequences. Organizations relying on Tenda M3 devices for network management may experience service interruptions, reduced network availability, and potential data exposure during the DoS events.
Mitigation strategies should prioritize immediate firmware updates from Tenda to address the specific stack overflow condition in the formSetAdConfigInfo function. Network administrators should implement network segmentation and access controls to limit exposure of affected devices to untrusted networks. Additional protective measures include monitoring network traffic for unusual patterns related to configuration requests and implementing intrusion detection systems capable of identifying malformed authIPs parameter submissions. Security teams should also consider disabling unnecessary administrative interfaces and implementing strict input validation for all user-supplied parameters. The vulnerability underscores the importance of firmware security testing and regular security assessments for network infrastructure devices, particularly those handling user input through web interfaces.