CVE-2021-26088 Auth bypass in Fortinet FSSO Windows DC Agent, FSSO Windows CA
Unauthenticated attackers can bypass firewall policies and access protected networks by sending crafted UDP packets to the FSSO Collector.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26088?
CVE-2021-26088 is a high-severity authentication bypass vulnerability in Fortinet FSSO Windows DC Agent, FSSO Windows CA, published on 12 Jul 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO firewall policy and access the protected network via sending specifically crafted UDP login notification packets.
Weakness: CWE-287
Which versions are affected by CVE-2021-26088?
It affects 1 product.
Products include Fortinet Fortinet Single Sign-On.
How do I fix CVE-2021-26088?
No fix has been published for CVE-2021-26088 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-26088 being exploited?
There is no known exploitation of CVE-2021-26088 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-pp6p-mhjc-6vgp.