CVE-2018-0568 in Joruri Gw
Summary
by MITRE
Unrestricted file upload vulnerability in SiteBridge Inc. Joruri Gw Ver 3.2.0 and earlier allows remote authenticated users to execute arbitrary PHP code via unspecified vectors.
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Analysis
by VulDB Data Team • 02/04/2020
The vulnerability identified as CVE-2018-0568 represents a critical security flaw in SiteBridge Inc.'s Joruri Gw version 3.2.0 and earlier implementations. This issue manifests as an unrestricted file upload vulnerability that fundamentally undermines the application's security posture by allowing authenticated users to bypass normal file validation mechanisms. The vulnerability exists within the file upload functionality of the web application, creating an attack surface that can be exploited by malicious actors who have already gained legitimate access to the system. The unspecified vectors suggest that the vulnerability could be triggered through multiple pathways within the upload process, making it particularly challenging to defend against through simple input validation measures.
The technical flaw underlying CVE-2018-0568 stems from inadequate validation and sanitization of file uploads within the Joruri Gw application. When authenticated users submit files through the web interface, the system fails to properly verify file types, extensions, or content, allowing attackers to upload malicious PHP scripts that can be executed within the web server context. This weakness directly maps to CWE-434, which describes the improper restriction of uploads of executable files, and represents a classic path to remote code execution through file upload vulnerabilities. The vulnerability's classification as authenticated indicates that exploitation requires a legitimate user account, but once achieved, the attacker can leverage the system's trust relationship to execute arbitrary code with the privileges of the web application.
The operational impact of this vulnerability is severe and multifaceted, potentially enabling full system compromise and persistent access to the affected environment. Remote code execution capabilities allow attackers to deploy backdoors, exfiltrate sensitive data, modify application behavior, or establish persistent command and control channels. The vulnerability affects organizations using Joruri Gw version 3.2.0 or earlier, which could include government agencies, educational institutions, or enterprises relying on this content management system. The presence of this vulnerability in production environments creates significant risk exposure, particularly when combined with the fact that authenticated access is sufficient for exploitation, suggesting that insider threats or compromised accounts could easily leverage this weakness. The attack surface extends beyond immediate code execution to include potential lateral movement within networks, as attackers can use the compromised system as a foothold for further infiltration.
Mitigation strategies for CVE-2018-0568 must address both immediate remediation and long-term security improvements. The primary recommendation involves upgrading to a patched version of Joruri Gw, as SiteBridge Inc. would have likely released a security update addressing this specific vulnerability. Organizations should implement comprehensive file upload validation mechanisms including strict file type checking, content verification, and the use of secure file naming conventions. The principle of least privilege should be enforced by ensuring that uploaded files are stored outside the web root directory and executed with minimal permissions. Network segmentation and monitoring controls should be deployed to detect suspicious file upload activities and potential exploitation attempts. Additionally, regular security assessments and penetration testing should be conducted to identify similar vulnerabilities within the application stack. Implementation of web application firewalls and content delivery network security measures can provide additional layers of protection against file upload attacks. Organizations should also establish incident response procedures specifically tailored to handle such vulnerabilities, ensuring rapid identification, containment, and remediation of exploitation attempts.