CVE-2021-1256: cisco cisco firepower threat defense software

Vulnerability summary

CVE-2021-1256 is a medium (CVSS 6.0) vulnerability in cisco cisco firepower threat defense software. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.5% of scored vulnerabilities.

Timeline

1. 29-04-2021
   PublishedVulnerability first disclosed.
2. 08-11-2024
   Last modifiedVulnerability information updated.

Description

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.

• CWE-552Files or Directories Accessible to External PartiesThe product makes files or directories accessible to unauthorized actors, even though they should not be.
• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.