Symantec Fixes Gateway Security Issues

Tuesday, April 19, 2016 @ 04:04 PM gHale

Symantec mitigated two privilege escalation issues having an impact on the Symantec Messaging Gateway (SMG) Appliance 10.x management console, according to a report on US-CERT.

An authorized SMG Management console user with at least read-access could potentially locate and decrypt the encrypted AD password stored on the SMG appliance. While encrypted, a determined authorized but malicious user could potentially reverse engineer the encrypted AD password. Recovery of this password would not provide any additional access to the SMG appliance however, it could potentially permit leveraging unauthorized, elevated access to additional resources on the network.

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An authorized SMG Management console administrator- or support-level user could potentially manipulate code input to the terminal window to escape into a privileged root shell on the console. Successfully gaining a privileged shell could possibly result in unauthorized command execution on or access to the management console and the operating system.

In a typical installation the Symantec Messaging Gateway management interface should not be accessible external to the network environment and access should end up restricted to specified users/administrators which would restrict this type of malicious activity to some level of authorized user.

Symantec product engineers have addressed these issues in SMG Appliance maintenance release 10.6.1. Customers should update to the latest maintenance release as soon as possible to address these issues.

Symantec is not aware of exploitation of or adverse customer impact from this issue.

Symantec Mail Gateway Appliance maintenance release 10.6.1 is available through the software update facility.

As part of normal best practices, Symantec strongly recommends the following:
• Restrict access to administrative or management systems to authorized privileged users.
• Restrict remote access, if required, to trusted/authorized systems only.

• Run under the principle of least privilege where possible to limit the impact of potential exploit.
• Keep all operating systems and applications current with vendor patches

• Follow a multi-layered approach to security; at a minimum, run firewall and anti-malware applications to provide multiple points of detection and protection to both inbound and outbound threats.

• Deploy network- and host-based intrusion detection systems to monitor network traffic for signs of anomalous or suspicious activity. This may aid in the detection of attacks or malicious activity related to the exploitation of latent vulnerabilities.