CVE-2021-1256 MEDIUM

CVE-2021-1256: Cisco Firepower Threat Defense Software Command File Overwrite Vulnerability

Vendor Cisco
Product Cisco Firepower Threat Defense Software
Weakness CWE-552 · Files accessible externally
Published April 29, 2021
Last update November 8, 2024

CVSS base score

6.0/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

What the vulnerability does

01Description

A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to overwrite files on the file system of an affected device by using directory traversal techniques. A successful exploit could cause system instability if important system files are overwritten. This vulnerability is due to insufficient validation of user input for the file path in a specific CLI command. An attacker could exploit this vulnerability by logging in to a targeted device and issuing a specific CLI command with crafted user input. A successful exploit could allow the attacker to overwrite arbitrary files on the file system of the affected device. The attacker would need valid user credentials on the device.

Key dates

02Disclosure timeline

April 29, 2021 CVE published
November 8, 2024 Record updated