CVE-2023-39110 in rconfig
Summary
by MITRE • 08/01/2023
rconfig v3.9.4 was discovered to contain a Server-Side Request Forgery (SSRF) via the path parameter at /ajaxGetFileByPath.php. This vulnerability allows authenticated attackers to make arbitrary requests via injection of crafted URLs.
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Analysis
by VulDB Data Team • 08/24/2023
The vulnerability identified as CVE-2023-39110 affects rconfig version 3.9.4 and represents a critical Server-Side Request Forgery flaw that compromises the security of the application's file handling functionality. This vulnerability exists within the /ajaxGetFileByPath.php endpoint where the path parameter is processed without adequate validation or sanitization, creating a dangerous attack vector for authenticated adversaries. The flaw allows malicious users to manipulate the application's internal request mechanisms by injecting crafted URLs that can traverse network boundaries and access resources otherwise restricted by network segmentation.
The technical implementation of this vulnerability stems from improper input validation within the path parameter processing logic. When an authenticated user submits a request containing a maliciously crafted path value, the application fails to properly validate or sanitize the input before using it in subsequent network requests. This allows attackers to construct URLs that can target internal systems, bypass access controls, and potentially access sensitive resources within the network infrastructure. The vulnerability operates at the application layer and can be exploited to perform unauthorized network requests to internal services, databases, or other systems that are typically protected by firewalls or network segmentation policies.
The operational impact of CVE-2023-39110 extends beyond simple data exfiltration, as it provides attackers with the capability to perform reconnaissance activities within the internal network environment. Authenticated attackers can leverage this vulnerability to map internal network topology, discover internal services, and potentially escalate privileges by accessing administrative interfaces or sensitive system files. The vulnerability can be particularly dangerous in enterprise environments where rconfig is used for network configuration management, as it may allow attackers to access network device configurations, system credentials, or other sensitive operational data. This type of vulnerability directly aligns with CWE-918 which specifically addresses Server-Side Request Forgery vulnerabilities, and can be mapped to ATT&CK technique T1071.004 for application layer protocol execution.
Mitigation strategies for this vulnerability should focus on immediate input validation and sanitization measures within the application code. The most effective approach involves implementing strict parameter validation that rejects any input containing potentially dangerous URL schemes or network protocols. Organizations should also consider implementing network-level restrictions that prevent internal applications from making arbitrary outbound requests, combined with proper access controls and authentication mechanisms. Additionally, implementing a Web Application Firewall (WAF) rule to detect and block suspicious URL patterns can provide an additional layer of protection. The vulnerability highlights the importance of following secure coding practices and implementing proper input validation as outlined in OWASP Top 10 security guidelines, particularly focusing on preventing injection attacks that can lead to unauthorized system access and data compromise.