gsd-2020-26276
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
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.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2020-26276",
"description": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go\u0027s 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.",
"id": "GSD-2020-26276"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2020-26276"
],
"details": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go\u0027s 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.",
"id": "GSD-2020-26276",
"modified": "2023-12-13T01:22:08.904119Z",
"schema_version": "1.4.0"
}
},
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"ID": "CVE-2020-26276",
"STATE": "PUBLIC",
"TITLE": "SAML authentication vulnerability in Fleet"
},
"affects": {
"vendor": {
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{
"product": {
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"product_name": "fleet",
"version": {
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}
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}
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"value": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go\u0027s 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."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 10,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-290: Authentication Bypass by Spoofing"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx",
"refsource": "CONFIRM",
"url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx"
},
{
"name": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607",
"refsource": "MISC",
"url": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607"
},
{
"name": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020",
"refsource": "MISC",
"url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020"
},
{
"name": "https://github.com/mattermost/xml-roundtrip-validator",
"refsource": "MISC",
"url": "https://github.com/mattermost/xml-roundtrip-validator"
},
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"name": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities",
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}
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},
"source": {
"advisory": "GHSA-w3wf-cfx3-6gcx",
"discovery": "UNKNOWN"
}
},
"gitlab.com": {
"advisories": [
{
"affected_range": "\u003cv3.5.1",
"affected_versions": "All versions before 3.5.1",
"cvss_v2": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"cwe_ids": [
"CWE-1035",
"CWE-290",
"CWE-937"
],
"date": "2022-02-11",
"description": "Fleet is an open source osquery manager. In Fleet, due to issues in Go\u0027s 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.",
"fixed_versions": [
"v3.5.1"
],
"identifier": "CVE-2020-26276",
"identifiers": [
"GHSA-w3wf-cfx3-6gcx",
"CVE-2020-26276"
],
"not_impacted": "All versions starting from 3.5.1",
"package_slug": "go/github.com/fleetdm/fleet/v4",
"pubdate": "2022-02-11",
"solution": "Upgrade to version 3.5.1 or above.",
"title": "Authentication Bypass by Spoofing",
"urls": [
"https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx",
"https://nvd.nist.gov/vuln/detail/CVE-2020-26276",
"https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607",
"https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020",
"https://github.com/mattermost/xml-roundtrip-validator",
"https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities",
"https://github.com/advisories/GHSA-w3wf-cfx3-6gcx"
],
"uuid": "6c208398-0083-4500-afe2-77e5055d1a09",
"versions": [
{
"commit": {
"sha": "55a2aa2c955a99483b730e60207e4afada7bda8a",
"tags": [
"3.5.1"
],
"timestamp": "20201215024503"
},
"number": "v3.5.1"
}
]
}
]
},
"nvd.nist.gov": {
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"nodes": [
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"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "3.5.1",
"vulnerable": true
}
],
"operator": "OR"
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"cve": {
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"ID": "CVE-2020-26276"
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"description": {
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"value": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go\u0027s 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."
}
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},
"problemtype": {
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"value": "CWE-290"
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"references": {
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"name": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020",
"refsource": "MISC",
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"Third Party Advisory"
],
"url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020"
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},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 6.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9
}
},
"lastModifiedDate": "2020-12-18T19:11Z",
"publishedDate": "2020-12-17T20:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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