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GHSA-52jx-g6m5-h735
No affected components available
Summary
A vulnerability in Fleet’s SAML authentication handling could allow an attacker to forge authentication assertions and gain unauthorized access to Fleet. In certain configurations, this could result in the creation of new user accounts, including administrative accounts. This issue affects Fleet deployments using single sign-on (SSO).
Impact
In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to:
- Forge authentication assertions, potentially impersonating legitimate users.
- If Just-In-Time (JIT) provisioning is enabled, the attacker could provision a new administrative user account.
- If MDM enrollment is enabled, certain endpoints could be used to create new accounts tied to forged assertions.
This could allow unauthorized access to Fleet, including administrative access, visibility into device data, and modification of configuration.
Patches
This issue is addressed in commit fc96cc4 and is available in Fleet version 4.64.2.
The following backport versions also address this issue:
- 4.63.2
- 4.62.4
- 4.58.1
- 4.53.2
Workarounds
If an immediate upgrade is not possible, Fleet users should temporarily disable single-sign-on (SSO) and use password authentication.
Credit
Thank you @hakivvi, as well as Jeffrey Hofmann and Colby Morgan from the Robinhood Red Team for finding and reporting this vulnerability using our responsible disclosure process.
For more information
If you have any questions or comments about this advisory:
- Email us at security@fleetdm.com
- Join #fleet in osquery Slack
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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