Compliance Impact

The vulnerability in JiZhiCMS 2.5.6 allows remote SQL injection, which can lead to unauthorized access, modification, or extraction of sensitive data stored in the database.

Such unauthorized data access or breaches can compromise the confidentiality and integrity of personal or sensitive information, potentially violating data protection regulations like GDPR or HIPAA that require safeguarding of personal data.

Therefore, exploitation of this vulnerability could result in non-compliance with these standards due to failure to adequately protect sensitive data from unauthorized access.

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Mitigation Strategies

To mitigate the SQL injection vulnerability in JiZhiCMS up to version 2.5.6, immediate steps include avoiding the use of the vulnerable functionality that processes the 'sqls' parameter in the /index.php/admins/Sys/addcache.html route.

Specifically, restrict or disable access to the back-end management interface section Extension Management → Fragmentation → Add Fragment, where the vulnerable htmlspecialchars_decode function is used without proper input sanitization.

Additionally, avoid running automated or batch testing tools against this endpoint to prevent unintended impacts, as the vulnerability can be exploited remotely and the exploit is publicly known.

If possible, apply input validation and sanitization or use parameterized queries to prevent SQL injection until an official patch or update is available.

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Executive Summary

This vulnerability in JiZhiCMS version 2.5.6 is a SQL injection flaw caused by improper handling of user input. Specifically, the function htmlspecialchars_decode is used to decode input from the sqls parameter, which is then directly concatenated into SQL queries without proper sanitization or parameterization.

The vulnerable code is located in the back-end management interface under Extension Management → Fragmentation → Add Fragment, at the route /index.php/admins/Sys/addcache.html.

Attackers can remotely exploit this by injecting arbitrary SQL code into the sqls parameter, allowing them to perform actions such as extracting database information or causing delays to confirm the injection via time-based blind SQL injection techniques.

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Impact Analysis

This SQL injection vulnerability can allow attackers to execute arbitrary SQL commands on the affected JiZhiCMS database remotely.

• Attackers can extract sensitive information such as database names and contents.
• They may manipulate or delete data, potentially causing data loss or corruption.
• The vulnerability can be used to disrupt service or gain further unauthorized access.

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Detection Guidance

This vulnerability can be detected by testing the sqls parameter in HTTP requests sent to the route /index.php/admins/Sys/addcache.html for SQL injection.

A common detection method is to use time-based blind SQL injection payloads such as '1 and sleep(2)--' and observe if the server response is delayed by the sleep time, indicating vulnerability.

More advanced detection involves extracting database information by injecting payloads like '1 and if(ascii(substr(database(),1,1))=106,sleep(3),0)--' to confirm the vulnerability and gather details.

It is important to avoid batch testing with automated tools to prevent unintended impacts on the system.

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