CVE-2022-23600

Name of the Vulnerable Software and Affected Versions Fleet versions prior to 4.9.1

Description The issue exposes a limited ability to spoof SAML authentication with missing audience verification, impacting deployments using SAML SSO in two specific cases. A malicious or compromised Service Provider (SP) could reuse the SAML response to log into Fleet as a user, if the user has an account with the same email in Fleet and signs into the malicious SP via SAML SSO from the same Identity Provider (IdP) configured with Fleet. Additionally, a user with an account in Fleet could reuse a SAML response intended for another SP to log into Fleet, if the user is blocked from Fleet in the IdP but continues to have an account in Fleet.

Recommendations For versions prior to 4.9.1: Reduce the length of sessions on your IdP to reduce the window for malicious re-use. Limit the amount of SAML Service Providers/Applications used by user accounts with access to Fleet. When removing access to Fleet in the IdP, delete the Fleet user from Fleet as well. For the best resolution, upgrade to Fleet 4.9.1.