CVE-2020-26276: Authentication Bypass by Spoofing
Fleet is an open source osquery manager. In Fleet, 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 The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to is not possible, users should disable SSO authentication in Fleet.
References
- github.com/advisories/GHSA-w3wf-cfx3-6gcx
- github.com/fleetdm/fleet/blob/master/CHANGELOG.md
- github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607
- github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx
- github.com/mattermost/xml-roundtrip-validator
- mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities
- nvd.nist.gov/vuln/detail/CVE-2020-26276
Code Behaviors & Features
Detect and mitigate CVE-2020-26276 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →