CVE-2018-19327 in JTBC(PHP)
Summary
by MITRE
An issue was discovered in JTBC(PHP) 3.0.1.7. aboutus/manage.php?type=action&action=add allows CSRF.
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Analysis
by VulDB Data Team • 04/13/2020
The vulnerability identified as CVE-2018-19327 represents a cross-site request forgery flaw within the JTBC PHP content management system version 3.0.1.7. This security weakness specifically affects the aboutus/manage.php script where the type parameter with action=add functionality can be exploited through CSRF attacks. The issue arises from the absence of proper anti-CSRF mechanisms in the administrative interface, making it possible for attackers to perform unauthorized actions on behalf of authenticated users without their knowledge or consent. The vulnerability exists in the context of administrative operations where users with appropriate privileges can be tricked into executing malicious requests through crafted web pages or email attachments.
This CSRF vulnerability stems from the lack of anti-CSRF tokens or similar validation mechanisms in the affected script. When an authenticated administrator visits a malicious website or clicks on a compromised link, the attacker can construct a request that leverages the administrator's existing session to perform unauthorized actions such as adding new content or modifying existing data. The flaw is particularly concerning because it targets the management interface of the CMS, which typically grants users elevated privileges and access to sensitive system functions. The absence of CSRF protection in this administrative endpoint creates a pathway for attackers to manipulate the content management system without proper authorization, potentially leading to data corruption, unauthorized content injection, or privilege escalation.
The operational impact of this vulnerability extends beyond simple data manipulation as it can enable attackers to compromise the integrity of the entire content management system. An attacker could exploit this weakness to inject malicious content, modify existing content, or even establish persistence within the system through unauthorized administrative actions. The vulnerability affects the availability and integrity of the CMS, as unauthorized modifications can disrupt normal operations and potentially introduce security risks. Given that the affected version is a specific release of JTBC PHP, organizations running this version are particularly at risk, especially if administrators frequently visit untrusted websites or if the system lacks additional protective measures such as network segmentation or web application firewalls.
Organizations should implement immediate mitigations including the addition of anti-CSRF tokens to all administrative forms and actions within the CMS, ensuring that each request includes a unique token that validates the authenticity of the user's intent. The implementation should follow established security practices and standards such as those outlined in CWE-352, which specifically addresses cross-site request forgery vulnerabilities. Additionally, implementing proper session management, requiring multi-factor authentication for administrative accounts, and deploying web application firewalls can provide layered protection against such attacks. Security teams should also conduct regular vulnerability assessments to identify similar weaknesses in other components of the system and ensure that all administrative interfaces properly validate user requests through mechanisms aligned with ATT&CK framework techniques for credential access and privilege escalation. Organizations should also consider implementing content security policies and regularly updating their CMS to ensure they are not running vulnerable versions that may contain unpatched security flaws.