CVE-2017-7886 in ERP
Summary
by MITRE
Dolibarr ERP/CRM 4.0.4 has SQL Injection in doli/theme/eldy/style.css.php via the lang parameter.
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Analysis
by VulDB Data Team • 09/25/2020
The vulnerability CVE-2017-7886 represents a critical SQL injection flaw discovered in Dolibarr ERP/CRM version 4.0.4, specifically within the doli/theme/eldy/style.css.php component. This issue arises from insufficient input validation and sanitization of the lang parameter, which is directly incorporated into database queries without proper escaping or parameterization. The vulnerability exists in the web application's theme handling mechanism where user-supplied language parameters are processed to generate dynamic CSS content, creating an avenue for malicious actors to inject arbitrary SQL commands.
The technical exploitation of this vulnerability occurs when an attacker manipulates the lang parameter in the URL to include SQL payload sequences that bypass the application's input filtering mechanisms. The flaw stems from the application's failure to properly sanitize user input before incorporating it into SQL queries, allowing attackers to execute unauthorized database operations. This vulnerability falls under CWE-89, which specifically addresses SQL injection vulnerabilities where untrusted data is directly included in SQL command strings without proper validation or escaping mechanisms. The attack vector is particularly concerning as it targets the application's styling component, making it accessible through standard web browser interactions without requiring specialized tools or elevated privileges.
The operational impact of this vulnerability is severe as it enables attackers to perform unauthorized database operations including but not limited to data extraction, modification, or deletion. An attacker could potentially extract sensitive customer information, financial data, or administrative credentials stored within the Dolibarr database. The vulnerability also allows for privilege escalation and persistent backdoor installation, as the attacker could manipulate the application's configuration or user access controls. Furthermore, the exploitation could lead to complete database compromise, enabling attackers to establish long-term access to the organization's ERP/CRM system and potentially facilitate lateral movement within the network infrastructure.
Organizations using Dolibarr ERP/CRM version 4.0.4 should immediately implement multiple layers of mitigation strategies to address this vulnerability. The primary remediation involves applying the official security patch released by Dolibarr developers or upgrading to a patched version that properly sanitizes the lang parameter through parameterized queries or input validation. Additionally, implementing proper input validation at the application level, including whitelisting acceptable language codes and employing proper SQL escaping mechanisms, would prevent exploitation attempts. Network-level protections such as web application firewalls should be configured to detect and block suspicious SQL injection patterns in URL parameters. The implementation of principle of least privilege access controls and regular database audit logging would also enhance the overall security posture, enabling early detection of unauthorized database activities. Organizations should also conduct comprehensive security testing including penetration testing and code review to identify similar vulnerabilities in other components of their ERP/CRM systems, aligning with ATT&CK framework techniques for credential access and defense evasion.