Command Injection Vulnerability in TBK DVR Products
CVE-2024-3721

6.3MEDIUM

Key Information:

Vendor

Tbk

Status
Dvr-4104
Dvr-4216
Vendor
CVE Published:
13 April 2024

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC🟣 EPSS 83%📰 News Worthy

What is CVE-2024-3721?

A severe command injection vulnerability has been identified in the TBK DVR-4104 and DVR-4216 models. This issue arises from improper handling of certain parameters within a critical system file, specifically /device.rsp?opt=sys&cmd=S_O_S_T_R_E_A_MAX. Attackers can exploit this vulnerability by manipulating the 'mdb' or 'mdc' arguments, enabling remote execution of operating system commands without proper authorization. Given the public disclosure of this exploit, it poses significant risk to users if not addressed promptly. Affected versions are those released up to April 12, 2024. It is crucial for organizations to implement appropriate security measures and monitor for indicators of compromise.

Affected Version(s)

DVR-4104 20240412

DVR-4216 20240412

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2024-3721 - Proof of Concept

News Articles

favicon imageThe Hacker News

Mirai Variant Nexcorium Exploits CVE-2024-3721 to Hijack TBK DVRs for DDoS Botnet

CVE-2024-3721 and CVE-2023-33538 exploited in TBK DVRs and EoL TP-Link routers, enabling Mirai variants and DDoS risk.

18 hours ago

favicon imageDark Reading

"Broadside" Mirai Variant Targets Maritime Logistics Sector

'Broadside' is targeting a critical flaw in DVR systems to conduct command injection attacks that can hijack devices for persistence and lateral movement.

favicon imageBleepingComputer

New Mirai botnet infect TBK DVR devices via command injection flaw

A new variant of the Mirai malware botnet is exploiting a command injection vulnerability in TBK DVR-4104 and DVR-4216 digital video recording devices to hijack them.

References

https://vuldb.com/?id.260573
vdb-entrytechnical-description
https://vuldb.com/?ctiid.260573
signaturepermissions-required
https://vuldb.com/?submit.314969
third-party-advisory

EPSS Score

83% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 💰

    Used in Ransomware

  • 📰

    First article discovered by BleepingComputer

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

netsecfish (VulDB User)
.