SB2021071406 - FSSO DC Agent and Collector authentication bypass in Fortinet FortiOS
Published: July 14, 2021 Updated: September 20, 2024
Security Bulletin ID
SB2021071406
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper authentication (CVE-ID: CVE-2021-26088)
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in FSSO Collector when processing authentication requests. A remote attacker can send specifically crafted UDP login notification packets to bypass any firewall authentication rule and access the protected network.
The vulnerability affects both the FSSO DC Agent and Collector.
Remediation
Install update from vendor's website.