CVE-2018-8049 in Stealth SVG
Summary
by MITRE
The Stealth endpoint in Unisys Stealth SVG 2.8.x, 3.0.x before 3.0.1999, 3.1.x, 3.2.x before 3.2.030, and 3.3.x before 3.3.016, when running on Linux and AIX, allows remote attackers to cause a denial of service (crash) via crafted packets.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 01/21/2020
The CVE-2018-8049 vulnerability affects the Stealth endpoint functionality within Unisys Stealth SVG software across multiple version ranges including 2.8.x, 3.0.x before 3.0.1999, 3.1.x, 3.2.x before 3.2.030, and 3.3.x before 3.3.016. This security flaw specifically targets systems running on Linux and AIX operating systems where the Stealth endpoint service is active. The vulnerability represents a critical denial of service condition that can be exploited by remote attackers without requiring authentication or privileged access. The affected software implements a security solution designed to protect network communications through encryption and stealth mechanisms, making this vulnerability particularly concerning for organizations relying on such protective measures.
The technical nature of this vulnerability stems from insufficient input validation within the Stealth endpoint's packet processing logic. When the system receives crafted malicious packets, the parsing mechanism fails to properly handle malformed or specially constructed data payloads, leading to unexpected behavior that ultimately results in system crash or complete service termination. This type of vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-122, which covers buffer overflow vulnerabilities in heap-based memory management. The flaw likely occurs during packet header analysis or payload interpretation where the system does not adequately validate packet boundaries, length fields, or data structures before processing them, causing memory corruption that leads to the system instability.
From an operational perspective, this vulnerability presents significant risk to organizations deploying Unisys Stealth SVG solutions in production environments. The remote exploit capability means that attackers can trigger the denial of service condition from outside the network perimeter without requiring any credentials or access to the internal system. The impact extends beyond simple service disruption as the crash can potentially affect the entire network security infrastructure that relies on the Stealth endpoint for protecting sensitive communications. Organizations may experience extended downtime, loss of network visibility, and potential compromise of security posture during the recovery period, especially if the affected system serves as a critical gateway or security control point. The vulnerability's presence in multiple version streams indicates a widespread exposure across different deployment scenarios and customer installations.
Mitigation strategies for CVE-2018-8049 should prioritize immediate patch deployment from Unisys, as the vendor has released version 3.0.1999, 3.2.030, and 3.3.016 to address the issue. Network administrators should implement network segmentation to limit exposure of affected systems to untrusted networks and establish monitoring for unusual packet patterns that might indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1499.004, which covers network denial of service attacks, and organizations should consider implementing intrusion detection systems that can identify malformed packet traffic patterns associated with this specific vulnerability. Additionally, organizations should conduct thorough vulnerability assessments to identify all instances of affected software versions and establish incident response procedures specifically addressing stealth endpoint service failures. The remediation process should include comprehensive testing of patched versions in non-production environments before deployment to ensure that the fix does not introduce compatibility issues with existing security policies or network configurations.