JDBC URL Validation Bypass in DataEase Leads to RCE

Compliance Impact

The vulnerability allows attackers to achieve arbitrary code execution by bypassing JDBC URL validation in DataEase. Such unauthorized code execution can lead to unauthorized access, data breaches, or manipulation of sensitive data.

This kind of security flaw can impact compliance with standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive data against unauthorized access and breaches.

Exploitation of this vulnerability could result in violations of data protection requirements, potentially leading to legal and regulatory consequences for affected organizations.

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Executive Summary

This vulnerability exists in DataEase, an open source data visualization and analysis tool, in versions prior to 2.10.24. The issue arises because the H2 database JDBC URL validation logic in DataEase can be bypassed using special Unicode characters. These characters behave differently when case-converted by DataEase's validation compared to how the H2 database parses them. This discrepancy allows attackers to insert dangerous parameters, such as 'init', into malicious H2 JDBC connection strings. Exploiting this flaw can lead to arbitrary code execution on the affected system.

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Impact Analysis

The vulnerability can have severe impacts as it allows attackers to execute arbitrary code on systems running vulnerable versions of DataEase. This means an attacker could potentially take control of the affected system, manipulate data, disrupt services, or use the compromised system as a foothold for further attacks.

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Mitigation Strategies

The vulnerability is fixed in DataEase version 2.10.24.

To mitigate this vulnerability, you should upgrade your DataEase installation to version 2.10.24 or later.

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Detection Guidance

This vulnerability involves attackers crafting malicious H2 JDBC connection strings that bypass DataEase's URL validation by using special Unicode characters that differ in case-conversion behavior.

To detect potential exploitation attempts on your network or system, you should monitor for suspicious JDBC connection strings containing unusual Unicode characters such as the lowercase dotless i (ı) or long s (ſ) in place of normal ASCII characters.

Specifically, look for JDBC URLs that include parameters like "init" but with Unicode substitutions (e.g., "ınit" instead of "init") which evade lowercase-based validation.

Commands to help detect such attempts could include searching application logs or network captures for JDBC URLs with suspicious Unicode characters.

• Use grep or similar tools to search logs for suspicious JDBC URLs, for example:
• grep -P '\\u0131nit' /path/to/logfile # searches for 'ınit' with dotless i Unicode character
• grep -P '\\u017Finit' /path/to/logfile # searches for 'ſinit' with long s Unicode character
• Alternatively, search for any JDBC URL containing 'jdbc:h2:' with suspicious Unicode characters or unusual parameter patterns.

Network monitoring tools or intrusion detection systems can be configured to alert on JDBC connection strings containing these Unicode characters or suspicious parameter manipulations.

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