CVE-2022-45507 in W30E
Summary
by MITRE • 12/08/2022
Tenda W30E V1.0.1.25(633) was discovered to contain a stack overflow via the editNameMit parameter at /goform/editFileName.
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Analysis
by VulDB Data Team • 01/01/2023
The vulnerability identified as CVE-2022-45507 affects the Tenda W30E wireless router firmware version V1.0.1.25(633) and represents a critical stack overflow condition that can be exploited through the editNameMit parameter within the /goform/editFileName endpoint. This issue falls under the Common Weakness Enumeration category CWE-121, which specifically addresses stack-based buffer overflows where insufficient bounds checking allows attackers to overwrite adjacent memory locations on the stack. The affected device operates with a web-based management interface that processes user input through the goform framework, making it susceptible to malicious input manipulation.
The technical exploitation of this vulnerability occurs when an attacker submits a malformed payload to the editNameMit parameter, which is processed by the router's web server without adequate input validation or sanitization. The stack overflow condition arises because the firmware fails to properly validate the length of the input string before copying it into a fixed-size buffer allocated on the stack. This allows an attacker to overwrite the return address of the function and potentially execute arbitrary code with the privileges of the web server process, which typically runs with elevated privileges on the device. The vulnerability is particularly concerning because it affects the router's administrative interface, which is often accessible from the internet and may be exposed to unauthenticated attackers.
The operational impact of this vulnerability extends beyond simple remote code execution, as it can enable attackers to gain complete control over the affected router, potentially leading to man-in-the-middle attacks, DNS hijacking, or the establishment of persistent backdoors within the network. Network administrators may be unaware of the compromise, as the attacker can manipulate the router's configuration to hide their presence while maintaining access to the internal network. The vulnerability's exposure through the web interface means that attackers can exploit it without requiring physical access to the device or specialized network knowledge, making it particularly dangerous in environments where routers are not properly secured or regularly updated.
Mitigation strategies for CVE-2022-45507 should include immediate firmware updates from Tenda, as this vulnerability affects a specific version of the router firmware. Network administrators should also implement network segmentation to isolate critical devices from less secure segments, disable unnecessary services on the router, and monitor for unusual network traffic patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1071.004 for application layer protocol usage and T1059.001 for command and scripting interpreter, as exploitation would likely involve crafting malicious HTTP requests and potentially executing commands through the compromised device. Organizations should also consider implementing intrusion detection systems to monitor for exploitation attempts targeting the specific endpoint and parameter combination mentioned in the vulnerability description.