CVE-2022-29328 in DAP-1330
Summary
by MITRE • 05/10/2022
D-Link DAP-1330_OSS-firmware_1.00b21 was discovered to contain a stack overflow via the function checkvalidupgrade.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 05/12/2022
The vulnerability identified as CVE-2022-29328 affects D-Link DAP-1330 wireless access point devices running firmware version DAP-1330_OSS-firmware_1.00b21. This issue represents a critical stack overflow condition that occurs within the device's固件 implementation, specifically within the checkvalidupgrade function. The stack overflow vulnerability arises from insufficient input validation and bounds checking mechanisms when processing upgrade-related data, creating a potential pathway for arbitrary code execution and system compromise. The affected device operates as a wireless access point and likely serves as a network gateway or bridge, making it a prime target for attackers seeking to establish persistent access within network environments.
The technical flaw manifests when the checkvalidupgrade function processes user-supplied input without proper sanitization or length verification. This function appears to handle firmware upgrade validation procedures, where maliciously crafted input can cause the stack to overflow beyond its allocated memory boundaries. The overflow occurs in the context of the device's firmware update mechanism, which typically operates with elevated privileges and system-level access. According to CWE classification, this vulnerability maps to CWE-121 Stack-based Buffer Overflow, which is categorized under the broader family of buffer overflow vulnerabilities that can lead to complete system compromise. The attack vector involves sending specially crafted upgrade requests or firmware files that trigger the vulnerable code path, potentially allowing remote code execution and unauthorized system control.
The operational impact of this vulnerability extends beyond simple device compromise, as it can enable attackers to gain root-level access to the wireless access point and potentially use it as a foothold for lateral movement within the network. Network administrators may face unauthorized access to the device's configuration interfaces, enabling them to modify network settings, intercept traffic, or establish persistent backdoors. The vulnerability affects the device's ability to maintain secure firmware updates, as attackers can exploit the upgrade validation mechanism to install malicious firmware versions. This creates a persistent threat vector that could remain undetected for extended periods, especially in environments where network monitoring is insufficient. The impact is particularly severe in enterprise environments where wireless access points serve as critical network infrastructure components, potentially allowing attackers to disrupt network services or gain access to sensitive internal systems.
Mitigation strategies for CVE-2022-29328 should prioritize immediate firmware updates from D-Link, as the vendor has likely released patches addressing this specific vulnerability. Network administrators should implement network segmentation to limit access to affected devices and monitor for unusual traffic patterns that might indicate exploitation attempts. The implementation of network access controls and firewall rules can help restrict access to the device's management interfaces and upgrade endpoints. Additionally, regular vulnerability assessments and penetration testing should be conducted to identify similar issues in other network devices. From an ATT&CK framework perspective, this vulnerability aligns with techniques such as T1059 Command and Scripting Interpreter and T1078 Valid Accounts, as attackers may leverage the compromised device to execute commands and establish persistent access. Organizations should also consider implementing network monitoring solutions that can detect anomalous upgrade request patterns and unauthorized configuration changes to prevent exploitation of this vulnerability.