Security restrictions bypass in Cisco Firepower Management Center

1) Security restrictions bypass

EUVDB-ID: #VU15769

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 - Memory corruption

Exploit availability: No

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

External links

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

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.