#VU60931 Information disclosure in FortiOS - CVE-2020-15936 

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU60931

#VU60931 Information disclosure in FortiOS - CVE-2020-15936

Published: March 1, 2022


Vulnerability identifier: #VU60931
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-15936
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
FortiOS
Software vendor:
Fortinet, Inc

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the system via SNI Client Hello TLS packets. A remote attacker can send a specially crafted request to the system and gain access to sensitive information.


Remediation

Given that there is no systematic way to detect all exfiltration attempts and to exhaustively enumerate all possibilities offered by exfiltration channels, Fortinet has addressed the issue by releasing a set of signatures:

  1. Python/SNICat.A!exploit
    https://www.fortiguard.com/encyclopedia/virus/10069638

  2. SNIcat.Data.Exfiltration.Tool
    https://www.fortiguard.com/encyclopedia/ips/50952


External links