CVE-2019-12543 in ServiceDesk Plus
Summary
by MITRE
An issue was discovered in Zoho ManageEngine ServiceDesk Plus 9.3. There is XSS via the PurchaseRequest.do serviceRequestId parameter.
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Analysis
by VulDB Data Team • 12/16/2024
The vulnerability identified as CVE-2019-12543 represents a cross-site scripting flaw within Zoho ManageEngine ServiceDesk Plus version 9.3, specifically affecting the PurchaseRequest.do endpoint. This issue arises from insufficient input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before processing. The vulnerability is particularly concerning as it targets the serviceRequestId parameter, which is commonly used within service desk environments to track and manage purchase requests. Attackers can exploit this weakness by crafting malicious payloads that leverage the parameter to inject arbitrary JavaScript code into the application's response, potentially leading to unauthorized access or data manipulation.
The technical exploitation of this vulnerability follows standard XSS attack patterns where malicious input is accepted through the serviceRequestId parameter and subsequently rendered without proper sanitization. This flaw enables attackers to execute scripts in the context of the victim's browser, potentially allowing for session hijacking, credential theft, or redirection to malicious sites. The vulnerability aligns with CWE-79, which categorizes cross-site scripting as a critical weakness in web applications. The attack vector specifically demonstrates a reflected XSS scenario where the malicious payload is reflected back to the user through the application's response, making it particularly dangerous in enterprise environments where service desk applications handle sensitive business data and user credentials.
The operational impact of CVE-2019-12543 extends beyond simple script execution, as it represents a significant security risk for organizations relying on ManageEngine ServiceDesk Plus for their IT service management operations. In enterprise environments, this vulnerability could enable attackers to escalate privileges, access confidential purchase request data, or manipulate service desk workflows. The attack requires minimal sophistication and can be exploited through simple web requests, making it particularly dangerous in environments where multiple users interact with the service desk application. Organizations utilizing this platform face potential data breaches, compliance violations, and operational disruptions that could affect their entire IT service management infrastructure.
Mitigation strategies for this vulnerability should prioritize immediate patching of the affected ManageEngine ServiceDesk Plus version 9.3, as Zoho has released security updates addressing this specific XSS flaw. Organizations should implement input validation and output encoding controls at the application level to prevent malicious payloads from being processed, following the principle of least privilege in parameter handling. Network-based mitigations such as web application firewalls can provide additional protection by filtering suspicious requests targeting the vulnerable PurchaseRequest.do endpoint. Security teams should also conduct comprehensive testing to identify similar vulnerabilities in other parameters and endpoints within the service desk application. The remediation process should include monitoring for exploitation attempts and implementing proper access controls to limit the impact of potential successful attacks, as outlined in the ATT&CK framework's web application exploitation techniques. Regular security assessments and vulnerability scanning should be implemented to prevent similar issues in other components of the IT service management infrastructure.