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CVE-2018-20434

CriticalCVSS 9.8 / 10
Published Apr 24, 2019·Last modified Apr 10, 2026
Affected Components(0)

No affected components available

Description

LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the $_POST['community'] parameter to html/pages/addhost.inc.php during creation of a new device, and then making a /ajax_output.php?id=capture&format=text&type=snmpwalk&hostname=localhost request that triggers html/includes/output/capture.inc.php command mishandling.

Risk Scores
Base Score
9.8

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
9.6

Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.

EPSS
71.49%

The exploit probability is very high. The vulnerability is very likely to be exploited in the next 30 days.

Exploit
Functional

A functional exploit is available for this vulnerability (3 exploits found).

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