Impact Analysis

This vulnerability can have several serious impacts:

• Attackers can write files to arbitrary locations on the server filesystem.
• Remote code execution is possible by writing malicious files to cron directories, enabling persistent and automated attacks.
• Sensitive database contents can be exfiltrated by writing data to web-accessible directories.

Overall, this can lead to unauthorized access, data breaches, and compromise of the affected system.

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Executive Summary

CVE-2026-8773 is an argument injection vulnerability in the linlinjava Litemall project up to version 1.8.0. It affects the backup and load functions in the DbUtil.java file, where the db and password parameters are directly concatenated into system commands executed via Runtime.exec() without proper sanitization.

Because the commands are constructed as strings and split by whitespace, an attacker controlling these parameters can inject additional command-line arguments. This allows them to manipulate commands like mysqldump and mysql to perform unintended actions.

For example, an attacker can inject arguments to write files to arbitrary locations on the server, such as creating files in sensitive directories or writing to web-accessible folders. This can lead to remote code execution or data exfiltration.

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Detection Guidance

This vulnerability involves argument injection in the backup/load functions of Litemall's DbUtil.java, where the db and password parameters are unsafely concatenated into mysqldump and mysql commands.

To detect exploitation attempts on your system, you can monitor for unusual command executions involving mysqldump or mysql with suspicious additional arguments such as '--result-file=' which may indicate arbitrary file writes.

Example commands to detect suspicious processes or command lines include:

• Using ps to find mysqldump or mysql commands with suspicious arguments: ps aux | grep -E 'mysqldump|mysql' | grep -- '--result-file='
• Using auditd or process accounting to log executions of mysqldump and mysql and review for injected arguments.
• Searching web-accessible directories for unexpected files that may have been created by injected commands, e.g., find /var/www/html -type f -mtime -1

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Mitigation Strategies

Immediate mitigation involves preventing the argument injection vulnerability by avoiding the use of Runtime.exec(String) with concatenated parameters.

The recommended fix is to replace Runtime.exec(String) calls with ProcessBuilder using an argument array to safely pass parameters without risk of injection.

Additionally, restrict access to the vulnerable backup/load functions to trusted users only, and monitor for suspicious file writes or cron file modifications.

If possible, upgrade to a version of Litemall where this issue is fixed or apply patches that address this vulnerability.

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Compliance Impact

The vulnerability allows attackers to perform argument injection leading to arbitrary file writes, remote code execution, and exfiltration of database contents. This can result in unauthorized access to sensitive data stored in the database.

Such unauthorized access and potential data breaches can compromise compliance with data protection regulations like GDPR and HIPAA, which require safeguarding personal and sensitive information against unauthorized access and ensuring data integrity.

Therefore, exploitation of this vulnerability could lead to violations of these standards due to potential data exposure and lack of proper access controls.

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