Input validation error in Cisco Email Security Appliance - CVE-2018-15460

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Main Vulnerability Database Vulnerabilities #VU16923

Input validation error in Cisco Email Security Appliance - CVE-2018-15460

Published: January 10, 2019


Vulnerability identifier: #VU16923
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-15460
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Email Security Appliance

Detailed vulnerability description

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists in the email message filtering feature due to improper filtering of email messages that contain references to whitelisted URLs. A remote attacker can send a malicious email message that contains a large number of whitelisted URLs, cause the CPU utilization to increase to 100 percent and force the affected device to stop scanning and forwarding email messages.


How to mitigate CVE-2018-15460

The vulnerability has been addressed in the versions 12.0.0-281, 11.1.2-023, 11.0.2-044.

Sources