CVE Vulnerability

CVE-2020-26276

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.

6.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020 Release Notes Third Party Advisory
https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607 Patch Third Party Advisory
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities Not Applicable Third Party Advisory
https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx Third Party Advisory
https://github.com/mattermost/xml-roundtrip-validator Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*
Information

Published : 2020-12-17 08:15

Updated : 2020-12-18 07:11

NVD link : CVE-2020-26276

Mitre link : CVE-2020-26276

Products Affected
No products.
CWE
CWE-290

Authentication Bypass by Spoofing