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Cisco Firepower System Software URL Filtering Bypass Vulnerability

cisco-sa-20170524-fmc · Medium · Published · Updated

A vulnerability in the feature-license management functionality of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass URL filters that have been configured for an affected device. The vulnerability exists because the URL Filtering license for the affected software could be disabled unexpectedly, which could disable the URL filtering functionality of the affected software. An attacker could exploit this vulnerability by sending traffic, which should have matched a configured URL filter, through an affected device. A successful exploit could allow the attacker to bypass URL filters that were configured for the affected device. There is a workaround that addresses this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170524-fmc

Cisco advisory ·CSAF JSON

Workarounds

As a temporary workaround, administrators can enable URL filtering for a device again by doing the following in the GUI of the software:

Choose System > Integration.
Click the Cisco CSI tab.
Select the Enable URL Filtering checkbox.

CVEsCVE-2017-6674
Cisco Bug IDsCSCvb16413
CVSS ScoreBase 5.9
Base 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X
Product Names From Source
Cisco Firepower System Software

Related Products

Product CVE Evidence
Cisco Secure Firewall Management Center (FMC) CVE-2017-6674 Cisco OpenVuln
Cisco Nexus Dashboard CVE-2017-6674 Cisco OpenVuln
Cisco Application Centric Infrastructure Virtual Edge CVE-2017-6674 Cisco OpenVuln
Cisco Firepower System Software CVE-2017-6674 Cisco OpenVuln