CVE-2021-40407KEV · OVERDUECWE-78

Reolink RLC-410W IP Camera OS Command Injection Vulnerability

Critical · published January 28, 2022

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.1. It is confirmed in active exploitation. It sits in the 98.8th percentile for exploit probability.

652
days past CISA
deadline
CVSS v3.0
9.1
EPSS
48%
Percentile
98.8
In the wild
Confirmed
What it is

🚨 A crafty HTTP request can unleash OS command injection on Reolink cameras! This vulnerability packs a punch, affecting version v3.0.0.136_20121102! 🔥 Think of it like a mischievous kid who sneaks a note into a teacher's desk, directing them to do something they shouldn’t—here, the unvalidated ddns->domain variable acts like that sneaky note. If someone sends the right (or wrong!) HTTP request, they can make the device do their bidding! An attacker could gain unauthorized command execution on the device, potentially leading to a total takeover. This could mean spying on users, tampering with device settings, or even shutting the device down entirely—definitely not what anyone wants!

Put simply

Think of it like a mischievous kid who sneaks a note into a teacher's desk, directing them to do something they shouldn’t—here, the unvalidated ddns->domain variable acts like that sneaky note. If someone sends the right (or wrong!) HTTP request, they can make the device do their bidding! The vulnerability is due to improper validation of the ddns->domain variable in the SetDdns API, allowing an attacker to inject OS commands through crafted HTTP requests.

What to do

An attacker could gain unauthorized command execution on the device, potentially leading to a total takeover. This could mean spying on users, tampering with device settings, or even shutting the device down entirely—definitely not what anyone wants! Immediately update the Reolink RLC-410W firmware to the latest version to patch this vulnerability. Ensure that your device configurations validate all inputs rigorously. Regularly review your network security settings to catch potential threats early! You've got this! By taking these steps, you can turn your Reolink device into a fortified fortress! 🛡️

The record
Technical detail
CVSS v3.0
9.1 · CRITICAL
Vector
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.47635 · 98.8th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2022-01-28T19:10Z
KEV added
2024-12-18 · due 2025-01-08
EPSS history
Timeline
  • 18 DEC 00:00Z
    Added to CISA KEV — remediate by Jan 8
    kev
  • 28 JAN 19:10Z
    An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102
    cvelistv5