CVE-2024-0987 in KuERP
Summary
by MITRE • 01/29/2024
A vulnerability classified as critical has been found in Sichuan Yougou Technology KuERP up to 1.0.4. Affected is an unknown function of the file /runtime/log. The manipulation leads to improper output neutralization for logs. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-252252. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 02/21/2024
This critical vulnerability in Sichuan Yougou Technology KuERP version 1.0.4 represents a significant security flaw in the application's logging mechanism that could enable attackers to manipulate system logs and potentially execute arbitrary code. The vulnerability resides within the /runtime/log file and specifically affects an unknown function that handles log output processing, creating a dangerous improper output neutralization scenario that allows malicious actors to inject hostile content into system logs. The disclosure of this exploit to the public means that threat actors can now leverage this weakness without requiring advanced technical skills, making it particularly dangerous for organizations using this software.
The technical flaw stems from inadequate input validation and output sanitization within the logging subsystem, which violates fundamental security principles outlined in CWE-116 and CWE-707. When the application processes log entries, it fails to properly neutralize special characters and control sequences that could be interpreted by log parsers or display systems, creating a vector for log injection attacks. This weakness allows attackers to craft malicious log entries that may bypass security controls, manipulate audit trails, or even execute code if the logging system processes these entries in an unsafe manner. The vulnerability's classification as critical indicates that it can be exploited remotely without authentication and could lead to complete system compromise.
The operational impact of this vulnerability extends beyond simple log manipulation, potentially enabling attackers to hide their activities within legitimate log entries, disrupt system operations, or establish persistence within affected environments. Organizations using KuERP versions up to 1.0.4 face significant risk of undetected intrusion, data exfiltration, and system degradation. The lack of vendor response to early disclosure attempts compounds the severity of this situation, leaving users without official patches or mitigation guidance. This vulnerability directly relates to ATT&CK technique T1070.002 for "Indicator Removal on Host: File Deletion" and T1562.001 for "Impair Defenses: Disable or Modify Tools" as attackers could potentially corrupt or manipulate log files to avoid detection while maintaining access to compromised systems.
Organizations should immediately assess their exposure to this vulnerability by identifying all instances of KuERP 1.0.4 or earlier versions within their environment and implement immediate mitigations. The most effective immediate response involves disabling or restricting write access to the /runtime/log directory, implementing strict input validation for all log entry processing, and monitoring for suspicious log patterns that may indicate exploitation attempts. Additionally, organizations should consider implementing log integrity checks and automated alerting systems that can detect malformed log entries or unusual patterns that may suggest this vulnerability is being exploited. The absence of vendor response makes it imperative for users to develop their own emergency patches or consider upgrading to versions that have addressed this issue, as no official remediation is currently available from the vendor.