Symantec Messaging Gateway CVE-2019-18379 Server Side Request Forgery Security Bypass Vulnerability

Description

Symantec Messaging Gateway is prone to a security-bypass vulnerability. Attackers can exploit this issue to bypass certain security restrictions and perform unauthorized actions. This may aid in further attacks. Versions prior to Symantec Messaging Gateway 10.7.3 are vulnerable.

Technologies Affected

• Symantec Messaging Gateway 10.0
• Symantec Messaging Gateway 10.0.1
• Symantec Messaging Gateway 10.0.2
• Symantec Messaging Gateway 10.0.3
• Symantec Messaging Gateway 10.1
• Symantec Messaging Gateway 10.5.0
• Symantec Messaging Gateway 10.5.1
• Symantec Messaging Gateway 10.5.2
• Symantec Messaging Gateway 10.6
• Symantec Messaging Gateway 10.6.0-3
• Symantec Messaging Gateway 10.6.0-7
• Symantec Messaging Gateway 10.6.1
• Symantec Messaging Gateway 10.6.1-3
• Symantec Messaging Gateway 10.6.2
• Symantec Messaging Gateway 10.6.3
• Symantec Messaging Gateway 10.6.3-266
• Symantec Messaging Gateway 10.6.3-267
• Symantec Messaging Gateway 10.6.4
• Symantec Messaging Gateway 10.6.5
• Symantec Messaging Gateway 10.6.6
• Symantec Messaging Gateway 10.7.0
• Symantec Messaging Gateway 10.7.1
• Symantec Messaging Gateway 10.7.2
• Symantec Messaging Gateway 9.5
• Symantec Messaging Gateway 9.5.1
• Symantec Messaging Gateway 9.5.3
• Symantec Messaging Gateway 9.5.3-3
• Symantec Messaging Gateway 9.5.4

Recommendations

Block external access at the network boundary, unless external parties require service.
Block external access at the network boundary, unless external parties require service. Filter access to the affected computer at the network boundary if global access isn’t needed. Restricting access to only trusted computers and networks might greatly reduce the likelihood of a successful exploit.

Run all software as a nonprivileged user with minimal access rights.
Attackers may successfully exploit client flaws in the browser through cross-site scripting vulnerabilities. When possible, run client software as regular user accounts with limited access to system resources. This may limit the immediate consequences of client-side vulnerabilities.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity including unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Updates are available. Please see the references or vendor advisory for more information.