CVE-2020-26276 – github.com/fleetdm/fleet/v4

Package

Manager: go
Name: github.com/fleetdm/fleet/v4
Vulnerable Version: >=0 <3.5.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:U/RC:C

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00978 pctl0.75862

Details

SAML authentication vulnerability due to stdlib XML parsing ### Impact 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. ### Patches This issue is patched in 3.5.1 using https://github.com/mattermost/xml-roundtrip-validator. ### Workarounds If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet. ### References See https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ for more information about the underlying vulnerabilities. ### For more information If you have any questions or comments about this advisory: * Email us at [security@fleetdm.com](mailto:security@fleetdm.com) * Join #fleet in [osquery Slack](https://join.slack.com/t/osquery/shared_invite/zt-h29zm0gk-s2DBtGUTW4CFel0f0IjTEw)

Metadata

Created: 2022-02-11T23:59:14Z
Modified: 2022-02-11T23:59:14Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/02/GHSA-w3wf-cfx3-6gcx/GHSA-w3wf-cfx3-6gcx.json
CWE IDs: ["CWE-290"]
Alternative ID: GHSA-w3wf-cfx3-6gcx
Finding: F032
Auto approve: 1