Cyber Resilience

CVE-2024-0921

MediumPublic PoC

Published: 26 January 2024

Published
26 January 2024
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 4.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.1739 95.2th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-0921 is a medium-severity OS Command Injection (CWE-78) vulnerability in Dlink Dir-816 A2 Firmware. Its CVSS base score is 4.7 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 4.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis

A vulnerability has been found in D-Link DIR-816 A2 1.10CNB04 and classified as critical. It affects an unknown functionality of the file /goform/setDeviceSettings within the Web Interface component, where manipulation of the statuscheckpppoeuser argument leads to OS command injection. The flaw is tracked as CWE-78 with a CVSS 3.1 score of 4.7.

The attack can be launched remotely by an authenticated user with high privileges and requires no user interaction. Successful exploitation allows an attacker to execute arbitrary operating system commands on the device. Public exploit code for this issue has been disclosed.

The associated EPSS score reached a peak of 0.2194 after disclosure before settling at the current value of 0.1739, indicating emerging exploitation interest that warrants renewed attention from defenders. No mitigation details or patch information appear in the referenced advisories.

EU & UK References

Vulnerability details

A vulnerability has been found in D-Link DIR-816 A2 1.10CNB04 and classified as critical. Affected by this vulnerability is an unknown functionality of the file /goform/setDeviceSettings of the component Web Interface. The manipulation of the argument statuscheckpppoeuser leads to os…

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command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-252139.

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1202 Indirect Command Execution Stealth
Adversaries may abuse utilities that allow for command execution to bypass security restrictions that limit the use of command-line interpreters.
attack.mitre.org →
Why these techniques?

OS command injection in public-facing web interface (/goform/setDeviceSettings) enables exploitation of public-facing application (T1190), indirect command execution (T1202), and Unix shell command execution (T1059.004) on the router OS.

Affected Assets

dlink
dir-816 a2 firmware
1.10cnb04

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References