CVE-2018-0243

published 2018-04-19

CVE-2018-0243: A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a configured file action…

Priority P4 32 medium 5.8 CVSS 3.0

AV N AC L PR N UI N S C C N I L A N

A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to 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 vulnerability is due to incorrect detection of an SMB2 or SMB3 file based on the total file length. An attacker could exploit this vulnerability by sending a crafted SMB2 or SMB3 transfer request through the targeted device. An exploit could allow the attacker to pass SMB2 or SMB3 files that could be malware even though the device is configured to block them. This vulnerability does not exist for SMB Version 1 (SMB1) files. This vulnerability affects Cisco Firepower System Software when one or more file action policies are configured, on software releases prior to 6.2.3. Cisco Bug IDs: CSCvg68807.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
cisco	firepower_system	—	—
cisco	firepower_threat_defense	< 6.2.3	6.2.3

CVSS provenance

nvd v3.0 5.8 MEDIUM CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:N/I:P/A:N

vendor_cisco 5.8 MEDIUM

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