Critical severity9.8OSV Advisory· Published Apr 24, 2019· Updated Jun 17, 2026
CVE-2018-20434
CVE-2018-20434
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- ghsa-coords
Patches
Vulnerability mechanics
References
8- gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372dnvdExploitThird Party AdvisoryWEB
- shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434/nvdExploitTechnical DescriptionThird Party Advisory
- drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/viewnvdPermissions RequiredThird Party AdvisoryWEB
- github.com/advisories/GHSA-62q7-qj6g-gvr7ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2018-20434ghsaADVISORY
- shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434ghsaWEB
- packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.htmlnvd
- packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.htmlnvd
News mentions
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