CVE-2023-3705
About
The vulnerability exists in CP-Plus NVR due to an improper input handling at the web-based management interface of the affected product. An unauthenticated remote attacker could exploit this vulnerability by sending specially crafted HTTP requests to the vulnerable device.
Successful exploitation of this vulnerability could allow the remote attacker to obtain sensitive information on the targeted device.
Rainforest analyst review
CP-Plus NVR devices mishandle input in their web management interface, and an unauthenticated remote attacker who sends specially crafted HTTP requests can extract sensitive information from the device. These are network video recorders — the hub of a camera surveillance deployment — so the information at risk includes device and configuration data and potentially the credentials that guard the footage itself. No account is needed; the crafted request does the work.
Surveillance appliances are a favored target because they're routinely exposed to the internet for remote viewing and rarely watched as closely as servers. Unauthenticated disclosure on this class of device is exactly what opportunistic scanners sweep for, and leaked device details or credentials open the door to hijacking the camera feeds or using the recorder as a quiet foothold on the network it lives on.
Our angle is exposure mapping across the several affected models — the CP-VNR-3104, 3108, and 3208 lines and their firmware. We hunt for any of these NVRs reachable from untrusted networks, because a surveillance recorder facing the internet is the high-risk configuration here. Where we find them, network isolation and credential rotation come first; these devices are seldom patch-friendly, so reducing reachability is the durable control.
References
Related CVEs
Frequently asked questions
What is CVE-2023-3705?
The vulnerability exists in CP-Plus NVR due to an improper input handling at the web-based management interface of the affected product. An unauthenticated remote attacker could exploit this vulnerability by sending specially crafted HTTP requests to the vulnerable device. Successful exploitation of this vulnerability could allow the remote attacker to obtain sensitive information on the targeted device.
How severe is CVE-2023-3705?
CVE-2023-3705 carries a CVSS 3.1 base score of 7.5, rated high. On the Rainforest Risk Index — which weighs the severity alongside how easy the flaw is to reach and how broad its impact is — it scores 75 out of 100, in the high band.
How is CVE-2023-3705 exploited?
According to the CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N): attack vector Network, attack complexity Low, privileges required None, user interaction None. Impact on confidentiality High, integrity None and availability None.
Which products are affected by CVE-2023-3705?
Public advisories list the following as affected: cp-vnr-3104, cp-vnr-3104 firmware, cp-vnr-3108, cp-vnr-3108 firmware, cp-vnr-3208, cp-vnr-3208 firmware. Check the references on this page for the exact versions each vendor confirms.
How do I fix CVE-2023-3705?
Apply the fix the vendor published — the references on this page link to the primary advisories and patches. When patching can't happen right away, reduce the exposure of the affected component and watch it for exploitation attempts. Rainforest customers see this vulnerability correlated to their own assets and prioritized by real exposure, not by score alone.
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