Vulnerability identifier: #VU15769

Vulnerability risk: Low

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-15443

CWE-ID: CWE-119

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 attacker to bypass security restrictions on the target system.

The vulnerability exists in the detection engine due to incorrect TCP retransmission handling. A remote unauthenticated attacker can send a specially crafted TCP connection request through an affected device and bypass configured Intrusion Prevention System (IPS) rules and allow uninspected traffic onto the network.

Mitigation
Update to version 6.2.3.6.

Vulnerable software versions

Cisco Firepower Management Center: 6.1.0.6 - 6.2.3.3

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-fde-tcp-bypa...

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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.