Protection mechanism failure in Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC) - CVE-2018-0243
Published: April 20, 2018
Vulnerability identifier: #VU12074
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-0243
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC)
Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC)
Detailed vulnerability description
The vulnerability allows a remote unauthenticated attacker to bypass security restrictions on the target system.
The weakness exists in the detection engine due to incorrect detection of an SMB2 or SMB3 file based on the total file length. A remote attacker can send a specially crafted SMB2 or SMB3 transfer request, bypass a configured file action policy that is intended to drop the Server Message Block Version 2 (SMB2) and SMB Version 3 (SMB3) protocols if malware is detected.
The weakness exists in the detection engine due to incorrect detection of an SMB2 or SMB3 file based on the total file length. A remote attacker can send a specially crafted SMB2 or SMB3 transfer request, bypass a configured file action policy that is intended to drop the Server Message Block Version 2 (SMB2) and SMB Version 3 (SMB3) protocols if malware is detected.
How to mitigate CVE-2018-0243
Update to versions 6.2.3, 6.2.2.2 or 6.2.0.5.