CVE-2018-5243 in Encryption Management Server
Summary
by MITRE
The Symantec Encryption Management Server (SEMS) product, prior to version 3.4.2 MP1, may be susceptible to a denial of service (DoS) exploit. A DoS attack is a type of attack whereby the perpetrator attempts to make a particular machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a specific host within a network.
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Analysis
by VulDB Data Team • 05/04/2023
The Symantec Encryption Management Server represents a critical component in enterprise encryption infrastructure, serving as the central management point for encryption keys and policies across large-scale deployments. This vulnerability affects versions prior to 3.4.2 MP1, indicating a significant security gap that could be exploited by malicious actors to disrupt critical encryption services. The affected product operates as a centralized management system that handles encryption key management, policy enforcement, and administrative functions for Symantec's encryption solutions, making it a prime target for adversaries seeking to compromise enterprise security operations.
The technical flaw manifests as a denial of service vulnerability that allows attackers to disrupt the normal operation of the SEMS appliance. While the specific technical mechanism is not detailed in the CVE description, such vulnerabilities typically arise from improper input validation, resource exhaustion, or failure to handle exceptional conditions gracefully. The vulnerability likely exists in the server's processing of administrative requests, encryption key operations, or network communication protocols that could be manipulated to cause the system to crash or become unresponsive. This type of vulnerability falls under the broader category of resource exhaustion attacks that target application-level services rather than network infrastructure.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire encryption infrastructure managed by the SEMS. When the management server becomes unavailable, encryption policies cannot be updated, keys cannot be rotated, and administrative functions become inaccessible, creating a cascading effect that impacts all systems dependent on the encryption management platform. Organizations may experience extended downtime while restoring services, potential data accessibility issues, and increased operational overhead during incident response activities. The vulnerability could be exploited by both external attackers seeking to disrupt operations and insider threats with legitimate access to the system.
Mitigation strategies should prioritize immediate deployment of the patched version 3.4.2 MP1, which contains the necessary security fixes to address the denial of service vulnerability. Network segmentation and access controls should be implemented to limit exposure of the SEMS to untrusted networks, while monitoring systems should be configured to detect unusual traffic patterns or service disruptions. The vulnerability aligns with CWE-400, which covers resource exhaustion conditions, and could be leveraged as part of broader attack campaigns targeting enterprise infrastructure. Organizations should also implement redundant management systems where possible and establish incident response procedures specifically addressing encryption management server outages. From an ATT&CK perspective, this vulnerability could be categorized under T1499.004 for endpoint denial of service, representing a critical weakness in enterprise encryption infrastructure that requires immediate remediation to prevent potential data compromise or operational disruption.