{
"id": "GHSA-w3wf-cfx3-6gcx",
"aliases": [
"CVE-2020-26276"
],
"details": "### Impact\nDue 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.\n\nUsers that configure Fleet with SSO login may be vulnerable to this issue.\n\n### Patches\nThis issue is patched in 3.5.1 using https://github.com/mattermost/xml-roundtrip-validator.\n\n### Workarounds\nIf upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet.\n\n### References\nSee https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ for more information about the underlying vulnerabilities.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [[email protected] ](mailto:[email protected] )\n* Join #fleet in [osquery Slack](https://join.slack.com/t/osquery/shared_invite/zt-h29zm0gk-s2DBtGUTW4CFel0f0IjTEw)",
"summary": "SAML authentication vulnerability due to stdlib XML parsing",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.1"
}
]
}
],
"package": {
"name": "github.com/fleetdm/fleet/v4",
"ecosystem": "Go"
}
}
],
"modified": "2022-02-11T23:59:14Z",
"severity": [],
"published": "2022-02-11T23:59:14Z",
"references": [
{
"url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26276",
"type": "ADVISORY"
},
{
"url": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607",
"type": "WEB"
},
{
"url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020",
"type": "WEB"
},
{
"url": "https://github.com/mattermost/xml-roundtrip-validator",
"type": "WEB"
},
{
"url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-290"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2020-12-17T20:15:00Z",
"github_reviewed_at": "2021-05-21T20:46:21Z"
}
}