CVE-2019-20055 in LiquiFire OS
Summary
by MITRE
LuquidPixels LiquiFire OS 4.8.0 allows SSRF via the call%3Durl substring followed by a URL in square brackets.
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Analysis
by VulDB Data Team • 03/18/2024
The vulnerability identified as CVE-2019-20055 affects LiquiFire OS version 4.8.0, a software platform developed by LuquidPixels that is commonly deployed in industrial and embedded environments. This particular flaw represents a server-side request forgery vulnerability that arises from improper input validation within the application's processing logic. The vulnerability manifests when the system accepts a parameter containing the substring call%3Durl followed by a URL enclosed in square brackets, creating a dangerous pathway for unauthorized server communications.
The technical implementation of this vulnerability stems from the application's failure to properly sanitize user-supplied input before using it in server-side requests. When the system encounters the call%3Durl parameter followed by a URL in brackets, it processes this input without adequate validation or filtering mechanisms. This allows an attacker to craft malicious requests that can force the server to make unintended connections to internal or external systems. The vulnerability operates at the application layer and can be exploited through HTTP requests that manipulate the parameter structure to bypass normal access controls.
From an operational perspective, this SSRF vulnerability poses significant risks to organizations deploying LiquiFire OS 4.8.0 systems. Attackers can leverage this flaw to enumerate internal network resources, access backend services that should remain isolated, and potentially exfiltrate sensitive data from within the organization's trusted network boundaries. The vulnerability can be exploited to perform reconnaissance activities, access internal APIs, and potentially escalate privileges within the network infrastructure. The impact extends beyond simple information disclosure as it can enable further attack vectors including lateral movement and privilege escalation.
The vulnerability aligns with CWE-918, which specifically addresses server-side request forgery vulnerabilities, and demonstrates characteristics consistent with ATT&CK technique T1190, which involves exploiting vulnerabilities in web applications to gain unauthorized access. Organizations should prioritize immediate remediation through software updates provided by the vendor, as well as implementing network segmentation and firewall rules to restrict outbound connections from affected systems. Additional mitigations include input validation, parameter sanitization, and implementing web application firewalls to detect and block malicious requests containing the vulnerable parameter patterns. The vulnerability highlights the critical importance of proper input validation in embedded systems and underscores the need for comprehensive security testing throughout the software development lifecycle to prevent such dangerous flaws from reaching production environments.