Vulnerability identifier: #VU12081

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0233

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Firepower Management Center
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the Secure Sockets Layer (SSL) packet reassembly functionality of the detection engine due to improper handling of changes to SSL connection states. A remote attacker can send specially crafted SSL connections, trigger the detection engine to consume excessive system memory and cause the service to crash.

Mitigation
Update to versions 6.2.1, 6.2.0.3 or 6.1.0.6.

Vulnerable software versions

Cisco Firepower Management Center: 5.4.0 - 6.2.1

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-fpsnort

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.