CVE-2022-31395 in IP Zone Paging Adapter
Summary
by MITRE • 06/23/2022
Algo Communication Products Ltd. 8373 IP Zone Paging Adapter Firmware 1.7.6 allows attackers to perform a directory traversal via a web request sent to /fm-data.lua.
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Analysis
by VulDB Data Team • 06/24/2022
The vulnerability identified as CVE-2022-31395 affects the Algo Communication Products Ltd. 8373 IP Zone Paging Adapter firmware version 1.7.6, representing a critical directory traversal flaw that exposes sensitive system components to unauthorized access. This vulnerability resides within the web interface of the device and specifically targets the /fm-data.lua endpoint, which processes incoming web requests without proper input validation or sanitization. The flaw allows malicious actors to manipulate file paths through crafted HTTP requests, potentially enabling them to access restricted files and directories that should remain protected within the device's filesystem.
The technical implementation of this vulnerability stems from insufficient validation of user-supplied input parameters within the web application layer of the firmware. When an attacker submits a malicious request to the /fm-data.lua endpoint, the application fails to properly sanitize or validate the file path parameters, allowing attackers to exploit the lack of proper access controls and directory restrictions. This weakness directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as directory traversal or path traversal attacks. The vulnerability enables attackers to navigate through the file system hierarchy using sequences such as "../" to access files outside the intended directory structure.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to access sensitive system files, configuration data, and potentially execute arbitrary code within the device's environment. Attackers could leverage this flaw to extract firmware images, access authentication credentials stored in configuration files, or gain insights into the device's internal architecture and communication protocols. This access could facilitate further exploitation attempts, including privilege escalation or the deployment of persistent backdoors within the network infrastructure. The vulnerability particularly affects organizations relying on IP paging systems for critical communications, as compromise of these devices could disrupt emergency response systems and potentially provide attackers with a foothold for lateral movement within the network.
Mitigation strategies for this vulnerability should encompass immediate firmware updates from Algo Communication Products Ltd. to address the directory traversal flaw, along with network segmentation and access control measures to limit exposure of the affected device. Organizations should implement network monitoring to detect suspicious requests targeting the /fm-data.lua endpoint and consider disabling unnecessary web services on the device. The implementation of web application firewalls and input validation controls can help prevent exploitation attempts, while regular security assessments should verify that no other similar vulnerabilities exist within the device's web interface. This vulnerability aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments and T1071.004 for application layer protocol usage, highlighting the importance of proper input validation and access control mechanisms in networked devices. Additionally, security teams should conduct thorough penetration testing to identify potential additional attack vectors within the device's interface and ensure proper network segmentation to limit the impact of successful exploitation attempts.