OTPulse
FeedAboutContact

Hitron Systems Security Camera DVR

Plan Patch7.4ICS-CERT ICSA-24-030-04Jan 30, 2024
Attack VectorAdjacent
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

Hitron Systems DVR models (HVR-4781, HVR-8781, HVR-16781, LGUVR-4H, LGUVR-8H, LGUVR-16H) with firmware versions 1.03–4.02 (LGUVR models 1.02–4.02) contain an improper input validation vulnerability (CWE-20) and are protected by default credentials. Successful exploitation allows an attacker to cause a denial of service (crash/availability disruption) through malformed input or default credential access. Hitron has released firmware version 4.03 to address this vulnerability.

What this means
What could happen
An attacker with access to the local network could crash or disable the DVR, interrupting video surveillance and potentially affecting security monitoring in critical facilities like water or power plants.
Who's at risk
Water authorities, electric utilities, and other industrial facilities that rely on Hitron Systems DVR models (HVR-4781, HVR-8781, HVR-16781, LGUVR-4H, LGUVR-8H, LGUVR-16H) for security surveillance are affected. These cameras and DVRs are commonly deployed at substations, treatment plants, pumping stations, and other critical infrastructure sites.
How it could be exploited
An attacker on the local network (or with network access) could send specially crafted input to the DVR that bypasses input validation, causing a denial of service (crash). Alternatively, an attacker could use default credentials to log in and trigger the improper input validation to cause the outage.
Prerequisites
  • Network access to the DVR (Layer 2/3 local network or routed IP access)
  • Ability to send specially crafted input to the DVR interface
  • Optional: default or weak credentials if authentication is not properly secured
Remotely exploitable (local network)Default credentials likely presentLow complexity exploitationAffects surveillance systems (security monitoring)Actively exploited in the wild
Exploitability
Low exploit probability (EPSS 0.4%)
Affected products (6)
6 with fix
ProductAffected VersionsFix Status
DVR HVR-4781: >=1.03|<=4.02≥ 1.03|≤ 4.024.03
DVR HVR-8781: >=1.03|<=4.02≥ 1.03|≤ 4.024.03
DVR HVR-16781: >=1.03|<=4.02≥ 1.03|≤ 4.024.03
DVR LGUVR-4H: >=1.02|<=4.02≥ 1.02|≤ 4.024.03
DVR LGUVR-8H: >=1.02|<=4.02≥ 1.02|≤ 4.024.03
DVR LGUVR-16H: >=1.02|<=4.02≥ 1.02|≤ 4.024.03
Remediation & Mitigation
0/5
Do now
0/2
WORKAROUNDChange all default credentials on DVR devices immediately
HARDENINGRestrict network access to DVRs: ensure they are not reachable from the internet and block unnecessary inbound connections using firewalls
Schedule — requires maintenance window
0/2

Patching may require device reboot — plan for process interruption

HOTFIXUpgrade all DVR firmware to version 4.03 or later
HARDENINGIsolate DVR systems from business networks and place them on a separate, protected segment
Long-term hardening
0/1
HARDENINGIf remote DVR access is required, use VPN with strong authentication and keep VPN software updated
View full CISA ICS-CERT advisory
↑↓ Navigate · Esc Close
API: /api/v1/advisories/3492172b-e37c-4239-8484-9401f7467bda