SB2019042418 - OS Command Injection in LibreNMS
Published: April 24, 2019 Updated: August 8, 2020
Security Bulletin ID
SB2019042418
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) OS Command Injection (CVE-ID: CVE-2018-20434)
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
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.
Remediation
Install update from vendor's website.
References
- http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html
- http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html
- https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing
- https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372d
- https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434/