CVE-2017-17721 in BEIMS ContractorWeb .NET
Summary
by MITRE
CWEBNET/WOSummary/List in ZUUSE BEIMS ContractorWeb .NET 5.18.0.0 allows SQL injection via the tradestatus, assetno, assignto, building, domain, jobtype, site, trade, woType, workorderno, or workorderstatus parameter.
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Analysis
by VulDB Data Team • 01/18/2023
The vulnerability identified as CVE-2017-17721 represents a critical SQL injection flaw within the ZUUSE BEIMS ContractorWeb .NET 5.18.0.0 application, specifically affecting the CWEBNET/WOSummary/List component. This vulnerability exposes the system to unauthorized data access and manipulation through the exploitation of insecure input handling mechanisms. The affected parameters including tradestatus, assetno, assignto, building, domain, jobtype, site, trade, woType, workorderno, and workorderstatus all serve as potential entry points for malicious actors seeking to execute arbitrary SQL commands against the underlying database infrastructure.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization practices within the web application's data processing pipeline. When user-supplied parameters are directly incorporated into SQL query construction without proper escaping or parameterization, attackers can inject malicious SQL fragments that alter the intended query behavior. This flaw aligns with CWE-89 which specifically addresses SQL injection vulnerabilities, where improper handling of user input leads to unauthorized database access. The vulnerability operates at the application layer and can be exploited through HTTP requests containing specially crafted parameter values that manipulate the SQL execution context.
The operational impact of this vulnerability extends beyond simple data theft, encompassing complete database compromise and potential system-wide disruption. An attacker could extract sensitive information including user credentials, personal data, and business-critical records stored within the BEIMS system. The vulnerability also enables privilege escalation and persistent access to the database, allowing for long-term unauthorized surveillance and data manipulation. This type of attack falls under the ATT&CK technique T1071.004 for Application Layer Protocol and T1046 for Network Service Scanning, as attackers typically probe for such vulnerabilities before establishing persistent access. The affected system's exposure to this vulnerability creates a significant risk of data breaches and regulatory compliance violations.
Mitigation strategies for CVE-2017-17721 require immediate implementation of input validation and parameterized query construction practices. The most effective remediation involves replacing direct parameter concatenation with proper parameterized queries or stored procedures that separate SQL command structure from data values. Organizations should implement comprehensive input sanitization measures including length validation, character set restrictions, and regular expression filtering for all user-supplied parameters. Additionally, the application should employ proper error handling that does not expose database structure information to end users. Network-level protections such as web application firewalls and intrusion detection systems should be deployed to monitor and block suspicious SQL injection attempts. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in the application codebase, while maintaining up-to-date security patches and implementing the principle of least privilege for database access controls to minimize potential damage from successful exploitation attempts.