CVE-2023-6893 in Intercom Broadcasting System
Summary
by MITRE • 12/17/2023
A vulnerability was found in Hikvision Intercom Broadcasting System 3.0.3_20201113_RELEASE(HIK) and classified as problematic. Affected by this issue is some unknown functionality of the file /php/exportrecord.php. The manipulation of the argument downname with the input C:\ICPAS\Wnmp\WWW\php\conversion.php leads to path traversal. The exploit has been disclosed to the public and may be used. Upgrading to version 4.1.0 is able to address this issue. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-248252.
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Analysis
by VulDB Data Team • 01/11/2024
The vulnerability identified as CVE-2023-6893 resides within the Hikvision Intercom Broadcasting System version 3.0.3_20201113_RELEASE, representing a critical security flaw that enables unauthorized file system access through improper input validation. This issue specifically targets the /php/exportrecord.php component where the downname parameter becomes susceptible to malicious manipulation, allowing attackers to traverse the file system and potentially access sensitive data or execute arbitrary commands on the affected system.
The technical exploitation of this vulnerability occurs through path traversal attacks where the downname argument accepts malicious input containing directory traversal sequences such as C:\ICPAS\Wnmp\WWW\php. This type of vulnerability falls under CWE-22 Path Traversal and aligns with ATT&CK technique T1059 Command and Scripting Interpreter, as it enables attackers to manipulate system paths and potentially execute unauthorized operations. The flaw demonstrates a classic lack of proper input sanitization and validation, allowing attackers to bypass normal access controls and navigate to unintended directories within the system's file structure.
The operational impact of this vulnerability extends beyond simple data exposure, as it provides potential attackers with the capability to access sensitive system files, configuration data, and potentially gain deeper system access. Attackers could leverage this flaw to extract database credentials, system configuration files, or other critical information that could lead to further compromise of the intercom system and connected network infrastructure. The vulnerability particularly affects environments where Hikvision systems are integrated into larger security ecosystems, potentially providing lateral movement opportunities for threat actors already within the network perimeter.
Security mitigations for CVE-2023-6893 should prioritize immediate patch application from Hikvision, as the vendor has likely released security updates addressing this specific path traversal vulnerability. Organizations should implement network segmentation to limit access to the affected intercom system, disable unnecessary file system access for web applications, and conduct comprehensive network scanning to identify any potential exploitation attempts. Additionally, implementing proper input validation and output encoding mechanisms, along with regular security assessments, will help prevent similar vulnerabilities from emerging in other system components. The remediation process should also include monitoring for suspicious file access patterns and establishing incident response procedures to quickly address any exploitation attempts.