CVE-2018-15458 Information

Description

A vulnerability in the Shell Access Filter feature of Cisco Firepower Management Center (FMC) when used in conjunction with remote authentication could allow an unauthenticated remote attacker to cause high disk utilization resulting in a denial of service (DoS) condition. The vulnerability occurs because the configuration of the Shell Access Filter when used with a specific type of remote authentication can cause a system file to have unbounded writes. An attacker could exploit this vulnerability by sending a steady stream of remote authentication requests to the appliance when the specific configuration is applied. Successful exploitation could allow the attacker to increase the size of a system log file so that it consumes most of the disk space. The lack of available disk space could lead to a DoS condition in which the device functions could operate abnormally making the device unstable.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

http://www.securityfocus.com/bid/106516 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-fpwr-mc-dos

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5