Symantec Encryption Management Server - Denial of Service

SUMMARY

Symantec has released an update to address an issue in the Symantec Encryption Management Server product.

AFFECTED PRODUCTS

Symantec Encryption Management Server (SEMS)

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CVE

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Affected Version(s)

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Remediation

CVE-2018-5243

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Prior to 3.4.2 MP1

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Upgrade to 3.4.2 MP1

ISSUES

CVE-2018-5243

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Severity/CVSSv3:

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Medium / 5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References:

Impact:

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Security Focus: BID 105062 / NVD: CVE-2018-5243

Denial of service

Description:

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A denial of service (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.

MITIGATION

The aforementioned issue was validated by product team engineers. A Symantec Encryption Management Server update, version 3.4.2 MP1, has been made available. Note that the latest product releases are available to customers through normal support channels. At this time, Symantec is not aware of any exploitations or adverse customer impact from this issue.

Symantec recommends the following measures to reduce risk of attack:

• Restrict access to administrative or management systems to authorized privileged users.
• Restrict remote access 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 both firewall and anti-malware applications to provide multiple points of detection and protection for 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.

ACKNOWLEDGEMENTS

• CVE-2018-5243: _Wolfgang Elsen [email protected] & Christian Hailer _[email protected]