CVE-2019-6289 : Exploit Details and Defense Strategies

DedeCMS V57_UTF8_SP2 has a vulnerability in the uploads/include/dialog/select_soft.php file that allows remote attackers to execute arbitrary PHP code by manipulating file extensions.

Understanding CVE-2019-6289

This CVE entry describes a security flaw in DedeCMS V57_UTF8_SP2 that can be exploited by attackers to run malicious PHP code remotely.

What is CVE-2019-6289?

The vulnerability in DedeCMS V57_UTF8_SP2 enables attackers to upload files with safe extensions and rename them using a mixed-case variation of the .php extension to execute arbitrary PHP code.

The Impact of CVE-2019-6289

This vulnerability poses a significant risk as it allows remote attackers to take control of the affected system by executing malicious PHP code.

Technical Details of CVE-2019-6289

The technical aspects of this CVE include:

Vulnerability Description

The flaw in uploads/include/dialog/select_soft.php in DedeCMS V57_UTF8_SP2 permits remote execution of arbitrary PHP code through file extension manipulation.

Affected Systems and Versions

Product: DedeCMS V57_UTF8_SP2
Vendor: N/A
Version: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading files with safe extensions and then renaming them with a mixed-case variation of the .php extension, such as demonstrated by the filename 1.pHP.

Mitigation and Prevention

To address CVE-2019-6289, consider the following steps:

Immediate Steps to Take

Disable file uploads in the affected directory.
Implement input validation to restrict file types.
Regularly monitor and review uploaded files for suspicious activity.

Long-Term Security Practices

Conduct regular security audits and penetration testing.
Keep software and systems up to date with the latest security patches.

Patching and Updates

Apply patches or updates provided by DedeCMS to fix the vulnerability.