CVE-2018-20434: OS Command Injection
First published: Wed Apr 24 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Librenms Librenms | =1.46 | |
| composer/librenms/librenms | =1.46 |
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Reference Links
- 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/
- https://nvd.nist.gov/vuln/detail/CVE-2018-20434
- https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434
- https://github.com/advisories/GHSA-62q7-qj6g-gvr7 (Advisory)
Frequently Asked Questions
What is CVE-2018-20434?
CVE-2018-20434 is a vulnerability in LibreNMS 1.46 that allows remote attackers to execute arbitrary OS commands.
How does CVE-2018-20434 work?
CVE-2018-20434 works by using the $_POST['community'] parameter to execute arbitrary OS commands during the creation of a new device in LibreNMS 1.46.
What is the severity of CVE-2018-20434?
The severity of CVE-2018-20434 is critical with a CVSS score of 9.8.
How can I fix CVE-2018-20434?
To fix CVE-2018-20434, you should upgrade to a version of LibreNMS that is not affected by this vulnerability.
Are there any references for CVE-2018-20434?
Yes, you can find references for CVE-2018-20434 at the following links: http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html, http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html, and https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing.
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- agent/type
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- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-62q7-qj6g-gvr7
- alias/CVE-2018-20434
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- vendor/librenms
- canonical/librenms librenms
- version/librenms librenms/1.46
- package-manager/composer