CVE-2022-29329 in DAP-1330
Summary
by MITRE • 05/10/2022
D-Link DAP-1330_OSS-firmware_1.00b21 was discovered to contain a heap overflow via the devicename parameter in /goform/setDeviceSettings.
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Analysis
by VulDB Data Team • 05/12/2022
The vulnerability identified as CVE-2022-29329 affects D-Link DAP-1330 wireless access point devices running firmware version 1.00b21 and potentially other versions within the same release cycle. This heap overflow vulnerability exists within the device's web-based management interface, specifically in the /goform/setDeviceSettings endpoint which handles device name configuration parameters. The flaw represents a critical security weakness that could enable remote attackers to execute arbitrary code or cause denial of service conditions on affected devices. The vulnerability stems from insufficient input validation and memory management practices within the firmware's handling of user-supplied data through the devicename parameter.
The technical implementation of this heap overflow occurs when the device processes the devicename parameter submitted through the setDeviceSettings form. The firmware fails to properly validate the length or content of this parameter before copying it into a heap-allocated buffer. When an attacker submits a specially crafted devicename string that exceeds the allocated buffer size, the overflow condition triggers, potentially allowing memory corruption that could be exploited to overwrite adjacent heap memory locations. This type of vulnerability falls under CWE-121 heap-based buffer overflow, which is classified as a critical weakness in software security architecture. The vulnerability operates at the application layer and requires no authentication for exploitation, making it particularly dangerous as it can be triggered through unauthenticated web requests to the device's management interface.
The operational impact of this vulnerability extends beyond simple denial of service scenarios to potentially enable complete system compromise. An attacker could leverage this heap overflow to execute arbitrary code on the affected device, potentially gaining root access to the wireless access point's operating system. This would allow unauthorized users to modify network configurations, intercept wireless traffic, or use the compromised device as a pivot point for attacking other systems within the network. The vulnerability's accessibility through the web interface means that any attacker with network access to the device could exploit it, creating a significant risk for enterprise networks that rely on D-Link access points. The device's role as a wireless access point makes it a critical component in network infrastructure, and its compromise could lead to widespread network disruption or data breaches. This vulnerability also aligns with ATT&CK technique T1059.007 for command and control through web shell execution and T1499.004 for network disruption.
Mitigation strategies for CVE-2022-29329 should prioritize immediate firmware updates from D-Link to address the heap overflow vulnerability. Network administrators should implement network segmentation to isolate wireless access points from critical network segments and monitor for unusual traffic patterns that might indicate exploitation attempts. The implementation of web application firewalls and intrusion detection systems can help detect and block malicious requests targeting the vulnerable /goform/setDeviceSettings endpoint. Device hardening practices including disabling unnecessary services, implementing strong authentication mechanisms, and regularly auditing device configurations should be enforced. Organizations should also consider implementing network access controls to restrict direct access to wireless access point management interfaces from untrusted networks. The vulnerability highlights the importance of secure coding practices and proper input validation in embedded systems, particularly those with web-based management interfaces that are accessible over untrusted networks. Regular vulnerability assessments and penetration testing should be conducted to identify similar issues in other network infrastructure devices and firmware components.