What’s Vulnerable › Vulnerabilities

CVE-2018-18366

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-25 · updated 2026-06-17
• Weakness: CWE-908

Description

Symantec Norton Security prior to 22.16.3, SEP (Windows client) prior to and including 12.1 RU6 MP9, and prior to 14.2 RU1, SEP SBE prior to Cloud Agent 3.00.31.2817, NIS-22.15.2.22, SEP-12.1.7484.7002 and SEP Cloud prior to 22.16.3 may be susceptible to a kernel memory disclosure, which is a type of issue where a specially crafted IRP request can cause the driver to return uninitialized memory.

Affected products

• Symantec Endpoint Protection: 11.0, 11.0-mr1, 11.0-mr2, 11.0-mr3, 11.0-mr4, 11.0-mr4-mp2 (+44)
• Symantec Endpoint Protection Cloud: before 22.16.3 — fixed in 22.16.3
• Symantec Endpoint Protection Cloud Agent: before 3.00.31.2817 — fixed in 3.00.31.2817
• Symantec Corporation Norton Security: before 22.16.3 — fixed in 22.16.3

How to fix

Upgrade to a fixed version: Symantec Endpoint Protection Cloud 22.16.3; Symantec Endpoint Protection Cloud Agent 3.00.31.2817; Symantec Corporation Norton Security 22.16.3. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/107994
• https://support.symantec.com/en_US/article.SYMSA1479.html
• http://www.securityfocus.com/bid/107994
• https://support.symantec.com/en_US/article.SYMSA1479.html

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