CVE-2020-26276: SAML authentication vulnerability in Fleet
Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go's standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2020-26276?
CVE-2020-26276 has been classified with a medium severity due to the potential for unverified logins from a SAML identity provider.
How do I fix CVE-2020-26276?
To fix CVE-2020-26276, update your Fleet installation to version 3.5.1 or later.
What vulnerability does CVE-2020-26276 address?
CVE-2020-26276 addresses a vulnerability in Fleet's XML parsing that allows modification of the trusted document in a SAML response.
Which versions of Fleet are affected by CVE-2020-26276?
CVE-2020-26276 affects all Fleet versions prior to 3.5.1.
What could happen if CVE-2020-26276 is exploited?
If exploited, CVE-2020-26276 could enable attackers to facilitate unverified logins from a SAML identity provider.