CVE-2023-0126 in SMA1000
Summary
by MITRE • 01/19/2023
Pre-authentication path traversal vulnerability in SMA1000 firmware version 12.4.2, which allows an unauthenticated attacker to access arbitrary files and directories stored outside the web root directory.
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Analysis
by VulDB Data Team • 04/04/2025
The vulnerability identified as CVE-2023-0126 represents a critical pre-authentication path traversal flaw within the SMA1000 firmware version 12.4.2, exposing organizations to significant security risks. This weakness resides in the device's web interface handling of file requests, where insufficient input validation allows attackers to manipulate file path parameters and gain unauthorized access to sensitive system files. The vulnerability's pre-authentication nature means that no valid credentials are required to exploit this flaw, making it particularly dangerous as it can be leveraged by any remote attacker without prior system access. The SMA1000, typically deployed as a security appliance for network protection, becomes a prime target for adversaries seeking to extract confidential information from the device's file system.
The technical implementation of this path traversal vulnerability stems from improper sanitization of user-supplied input within the web application layer of the firmware. When the device processes file requests through its web interface, it fails to adequately validate or sanitize the path parameters, allowing attackers to append directory traversal sequences such as '../' to navigate outside the intended web root directory. This flaw directly maps to CWE-22, which defines path traversal vulnerabilities as weaknesses that occur when an application allows access to files and directories outside of its intended scope. The vulnerability enables attackers to access not only configuration files and system logs but potentially sensitive data stored within the appliance's file system, including cryptographic keys, user credentials, and system binaries.
The operational impact of CVE-2023-0126 extends beyond simple unauthorized file access, as it can facilitate more sophisticated attack vectors and compromise the overall security posture of networks relying on SMA1000 appliances. An attacker exploiting this vulnerability could extract system configuration files that reveal network topology details, authentication mechanisms, and operational parameters that would otherwise remain confidential. Additionally, the ability to access system files may enable attackers to identify potential privilege escalation opportunities or extract information that could be used for further attacks within the network. This vulnerability also aligns with ATT&CK technique T1083, which covers the discovery of system information through directory listing and file access, potentially enabling adversaries to gather intelligence for more targeted attacks.
Organizations utilizing SMA1000 firmware version 12.4.2 must implement immediate mitigations to protect their network infrastructure from exploitation of this vulnerability. The most effective immediate solution involves applying the firmware update provided by the vendor, which should include proper input validation and sanitization mechanisms to prevent directory traversal attacks. Network segmentation and access controls should be implemented to limit exposure of these devices to untrusted networks, while monitoring systems should be configured to detect anomalous file access patterns that might indicate exploitation attempts. Security teams should also conduct comprehensive vulnerability assessments to identify any other devices within their network that might be running vulnerable firmware versions. The remediation process should include network traffic analysis to detect potential exploitation attempts and ensure that the updated firmware properly addresses the path traversal vulnerability through proper parameter validation and access control mechanisms.