CVE-2022-23600 Information

Description

fleet is an open source device management built on osquery. Versions prior to 4.9.1 expose a limited ability to spoof SAML authentication with missing audience verification. This impacts deployments using SAML SSO in two specific cases: 1. A malicious or compromised Service Provider (SP) could reuse the SAML response to log into Fleet as a user – only if the user has an account with the same email in Fleet and the user signs into the malicious SP via SAML SSO from the same Identity Provider (IdP) configured with Fleet. 2. A user with an account in Fleet could reuse a SAML response intended for another SP to log into Fleet. This is only a concern if the user is blocked from Fleet in the IdP but continues to have an account in Fleet. If the user is blocked from the IdP entirely this cannot be exploited. Fleet 4.9.1 resolves this issue. Users unable to upgrade should: 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 and When removing access to Fleet in the IdP delete the Fleet user from Fleet as well.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

https://github.com/fleetdm/fleet/commit/35d5a7b285f15ddd47486fa656e8b1acf3d48374 https://github.com/fleetdm/fleet/security/advisories/GHSA-ch68-7cf4-35vr

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

6.5