CVE-2020-26276 (GCVE-0-2020-26276)
Vulnerability from cvelistv5 – Published: 2020-12-17 19:40 – Updated: 2024-08-04 15:56
VLAI
EPSS
VEX
Title
SAML authentication vulnerability in Fleet
Summary
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.
Severity
10 (Critical)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
GitHub_M
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/fleetdm/fleet/security/advisor… | x_refsource_CONFIRM |
| https://github.com/fleetdm/fleet/commit/57812a532… | x_refsource_MISC |
| https://github.com/fleetdm/fleet/blob/master/CHAN… | x_refsource_MISC |
| https://github.com/mattermost/xml-roundtrip-validator | x_refsource_MISC |
| https://mattermost.com/blog/coordinated-disclosur… | x_refsource_MISC |
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Nomenclature
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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