CVE-2019-8395 in ServiceDesk Plus
Summary
by MITRE
An Insecure Direct Object Reference (IDOR) vulnerability exists in Zoho ManageEngine ServiceDesk Plus (SDP) before 10.0 build 10007 via an attachment to a request.
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Analysis
by VulDB Data Team • 05/10/2020
The vulnerability CVE-2019-8395 represents a critical Insecure Direct Object Reference flaw within Zoho ManageEngine ServiceDesk Plus platform, specifically affecting versions prior to 10.0 build 10007. This security weakness allows unauthorized users to access sensitive data by manipulating object references that should normally be protected. The vulnerability manifests through attachment handling mechanisms within service requests, creating a pathway for attackers to bypass normal access controls and retrieve files they should not have permission to view. Such a flaw fundamentally undermines the application's authorization model and can lead to significant data exposure.
The technical implementation of this IDOR vulnerability stems from inadequate validation of user permissions when processing attachment requests within the ServiceDesk Plus framework. When users attempt to access attachments associated with service requests, the system fails to properly verify whether the requesting user has legitimate access rights to the specific object being referenced. This weakness enables attackers to construct malicious requests using direct object references, potentially accessing attachments belonging to other users or different service requests. The vulnerability resides in the application's object reference handling logic, where the system relies on predictable identifiers rather than proper access control checks.
The operational impact of this vulnerability extends beyond simple data exposure, as it can lead to comprehensive information disclosure attacks against the entire ServiceDesk Plus instance. An attacker exploiting this flaw could potentially access confidential customer data, internal documentation, technical specifications, and other sensitive attachments that should remain restricted to authorized personnel only. The scope of damage increases significantly in enterprise environments where ServiceDesk Plus manages critical business operations and customer service interactions, as the exposure of attachments can reveal sensitive business information, personal data, or proprietary content that violates privacy regulations and compliance requirements.
Mitigation strategies for CVE-2019-8395 should focus on implementing robust access control mechanisms and proper input validation within the ServiceDesk Plus application. Organizations should immediately upgrade to ServiceDesk Plus version 10.0 build 10007 or later, which contains the necessary patches to address this vulnerability. Additional protective measures include implementing proper access control checks for all object references, employing randomized identifiers for attachments, and conducting thorough security testing of all user interaction points. The vulnerability aligns with CWE-639 which specifically addresses Insecure Direct Object Reference issues, and represents a significant concern under the ATT&CK framework's credential access and privilege escalation categories, particularly in the context of data exposure and unauthorized information access. Security teams should also consider implementing network segmentation, monitoring for unusual attachment access patterns, and regular security audits to prevent exploitation of similar vulnerabilities in related systems.