CVE-2023-3704: Timestamp Modification Vulnerability in CP-Plus Digital Video Recorder

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-08-24 · updated 2026-06-17
Weakness: CWE-20

Description

The vulnerability exists in CP-Plus DVR due to an improper input validation within the web-based management interface of the affected products. 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 change system time of the targeted device.

Affected products

Cpplusworld Cp-Uvr-0401L1-4Kh Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302
Cpplusworld Cp-Uvr-0401L1B-4Kh Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302
Cpplusworld Cp-Uvr-0801F1-Hc Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302
Cpplusworld Cp-Uvr-0801K1-H Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302
Cpplusworld Cp-Uvr-0801K1B-H Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302
Cpplusworld Cp-Uvr-0808K1-H Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302
Cpplusworld Cp-Uvr-1601E1-H Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302
Cpplusworld Cp-Uvr-1601E1-Hc Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302
Cpplusworld Cp-Uvr-1601E2-H Firmware: before 4.000.00at008.0.0.r20230302 — fixed in 4.000.00at008.0.0.r20230302

How to fix

Upgrade to a fixed version: Cpplusworld Cp-Uvr-0401L1-4Kh Firmware 4.000.00at008.0.0.r20230302; Cpplusworld Cp-Uvr-0401L1B-4Kh Firmware 4.000.00at008.0.0.r20230302; Cpplusworld Cp-Uvr-0801F1-Hc Firmware 4.000.00at008.0.0.r20230302; Cpplusworld Cp-Uvr-0801K1-H Firmware 4.000.00at008.0.0.r20230302; Cpplusworld Cp-Uvr-0801K1B-H Firmware 4.000.00at008.0.0.r20230302; Cpplusworld Cp-Uvr-0808K1-H Firmware 4.000.00at008.0.0.r20230302; Cpplusworld Cp-Uvr-1601E1-H Firmware 4.000.00at008.0.0.r20230302; Cpplusworld Cp-Uvr-1601E1-Hc Firmware 4.000.00at008.0.0.r20230302; Cpplusworld Cp-Uvr-1601E2-H Firmware 4.000.00at008.0.0.r20230302. Check the vendor advisory for mitigations.

References

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