VulnerabilityModified

CVE-2018-15458

HIGH 7.5EPSS 3.07%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.07%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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 3.0: 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 3.07% probability · 87th percentile
CISA KEV: Not listed
Weakness: CWE-399, CWE-770
Affected: cisco/secure firewall management center
Source: psirt@cisco.com

References

http://www.securityfocus.com/bid/106516Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-fpwr-mc-dosVendor Advisory
http://www.securityfocus.com/bid/106516Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-fpwr-mc-dosVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.