CVE-2023-1201 in Server
Summary
by MITRE • 03/10/2023
Improper access control in the secure messages feature in Devolutions Server 2022.3.12 and below allows an authenticated attacker that possesses the message UUID to access the data it contains.
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Analysis
by VulDB Data Team • 04/04/2023
The vulnerability identified as CVE-2023-1201 represents a critical access control flaw within Devolutions Server's secure messaging functionality. This issue affects versions 2022.3.12 and earlier, where the system fails to properly validate access permissions for secure messages. The flaw specifically manifests when an authenticated attacker obtains a message UUID, which then grants them unauthorized access to the message contents without proper authorization checks. This represents a significant bypass of the intended security model that should require proper authentication and authorization before granting access to sensitive data.
The technical implementation of this vulnerability stems from inadequate input validation and access control mechanisms within the secure messaging component. When a message is created, the system generates a UUID for identification purposes, but the access control logic does not properly verify whether the requesting user has legitimate authorization to access that specific message. This weakness allows for privilege escalation through UUID enumeration and guessing attacks, where an attacker can exploit the predictable nature of UUID generation or obtain valid UUIDs through other means to access unauthorized data. The vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems, and demonstrates how insufficient access control checks can lead to unauthorized data exposure.
The operational impact of this vulnerability extends beyond simple data leakage, as it fundamentally undermines the security architecture of Devolutions Server's messaging system. An authenticated attacker who gains access to a message UUID can potentially access sensitive information that should remain protected within the secure messaging framework. This could include confidential communications, personal data, or business-sensitive information that organizations rely on Devolutions Server to protect. The vulnerability is particularly concerning because it requires minimal privileges to exploit - only authentication to the system and knowledge of a valid UUID, making it accessible to both internal and external threat actors who have gained initial access to the platform.
Organizations utilizing Devolutions Server versions prior to 2022.3.13 should prioritize immediate remediation through official patches provided by Devolutions. The mitigation strategy should include implementing proper access control validation for all message UUID requests, ensuring that each access attempt is authenticated and authorized against the message's intended recipients and permissions. Additional defensive measures include monitoring for unusual UUID access patterns, implementing rate limiting on message retrieval operations, and conducting comprehensive access control reviews. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and credential access, as attackers can leverage the flaw to gain unauthorized access to protected data without escalating privileges through traditional means. Organizations should also consider implementing network segmentation and monitoring solutions to detect potential exploitation attempts and establish incident response procedures for handling unauthorized access to secure communications.