CVE-2021-34762: cisco cisco firepower management center Path Traversal: '/dir/../filename'

Vulnerability summary

CVE-2021-34762 is a high (CVSS 8.1) Path Traversal: '/dir/../filename' vulnerability in cisco cisco firepower management center. EPSS estimates a 1.99% chance of exploitation in the next 30 days, higher than 80.2% of scored vulnerabilities.

Timeline

1. 27-10-2021
   PublishedVulnerability first disclosed.
2. 07-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. The vulnerability is due to insufficient input validation of the HTTPS URL by the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTPS request that contains directory traversal character sequences to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on the device.

• CWE-26Path Traversal: '/dir/../filename'The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize "/dir/../filename" sequences that can resolve to a location that is outside of that directory.
• 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.