Dahan JCMS Arbitrary File Download Scanner

Dahan JCMS is an advanced content management system designed for developers and content creators who require robust solutions for information management. It utilizes J2EE architecture, providing a comprehensive suite of services covering content creation, management, delivery, and sharing functions. Typically employed by medium to large organizations, this CMS is well-regarded for its adaptability and integration capabilities. It serves industries where digital content management is critical, such as publishing, corporate communications, and digital marketing. Its modular design allows for scalable implementations to suit various organizational needs. Dahan JCMS supports a range of extensions and plugins to enhance its functionality.

The Arbitrary File Download vulnerability in Dahan JCMS allows unauthorized access to files on the server. This vulnerability occurs due to inadequate validation of file paths, enabling attackers to read sensitive files. If exploited, this flaw can potentially disclose proprietary information and sensitive server data. The vulnerability surfaces when input parameters in URLs are not adequately verified, allowing traversal outside intended directory structures. It commonly affects applications that allow users to specify file paths or names without enforcing strict validation policies. Addressing this vulnerability is critical to prevent unauthorized access and data leakage.

Technically, this vulnerability centers around the down.jsp endpoint in the system's voting module. Attackers can exploit this by crafting a request to download any file from the server, utilizing predictable paths and file names. The vulnerable parameters are 'filename' and 'pathfile,' which can be manipulated to gain access to restricted files. A common attack vector includes inserting directory traversal patterns like '../' to bypass directory restrictions. Security responses should focus on sanitizing these inputs and enforcing strict access controls. Moreover, regular expressions can be employed to ensure file paths conform to expected formats.

If exploited, this vulnerability could lead to severe ramifications, including unauthorized disclosure of sensitive information. An attacker might access configuration files, database information, or system files, which could facilitate further attacks. Exploiting this weakness might also allow adversaries to uncover system architecture details, contributing to an increased attack surface. Additionally, sensitive data leaks could damage an organization’s reputation, lead to legal liabilities, and result in financial losses. Mitigating such threats requires implementing rigorous access controls and input validation measures.

REFERENCES

• https://www.hanweb.com/