Skip to content

LibreNMS arbitrary OS commands execution

Critical severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Apr 24, 2024

Package

composer librenms/librenms (Composer)

Affected versions

= 1.46

Patched versions

None

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.

References

Published by the National Vulnerability Database Apr 24, 2019
Published to the GitHub Advisory Database May 24, 2022
Reviewed Apr 24, 2024
Last updated Apr 24, 2024

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

95.080%
(99th percentile)

Weaknesses

CVE ID

CVE-2018-20434

GHSA ID

GHSA-62q7-qj6g-gvr7

Source code

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.