CVE-2021-44170: 
FortiOS vulnerability analysis and mitigation

A stack-based buffer overflow vulnerability [CWE-121] was discovered in the command line interpreter of FortiOS and FortiProxy. The vulnerability, identified as CVE-2021-44170, was internally discovered and reported by Giuseppe Cocomazzi of Fortinet Product Security team. The affected products include FortiOS versions from 6.0.0 through 7.0.2 and FortiProxy versions from 1.0.0 through 2.0.7 (Fortinet Advisory).

The vulnerability is classified as a stack-based buffer overflow (CWE-121) in the command line interpreter. It has been assigned a CVSS v3.1 base score of 6.7 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. This indicates that the vulnerability requires local access and high privileges, but requires no user interaction and can potentially impact confidentiality, integrity, and availability (NVD).

If successfully exploited, this vulnerability allows an authenticated attacker to execute unauthorized code or commands through specially crafted command line arguments. The potential impact includes unauthorized code execution and command execution capabilities (Fortinet Advisory).

The vulnerability requires local access and high privileges for exploitation. An authenticated attacker can trigger the vulnerability by using specially crafted command line arguments (NVD).

Fortinet has released patches to address this vulnerability. Users are advised to upgrade to FortiOS version 7.0.4 or above, FortiOS version 6.4.9 or above, FortiOS version 6.2.11 or above, or FortiProxy version 2.0.8 or above (Fortinet Advisory).