CVE-2018-20434

Public Exploit

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 66.99% Top 5%
Third-Party Advisory google.com Third-Party Advisory github.com Third-Party Advisory shells.systems
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372d third party advisory exploit
https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing third party advisory permissions required
https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434/ exploit third party advisory technical description
http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html
http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html

Frequently Asked Questions

What is the severity of CVE-2018-20434?
CVE-2018-20434 has been scored as a critical severity vulnerability.
How to fix CVE-2018-20434?
To fix CVE-2018-20434, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-20434 being actively exploited in the wild?
It is possible that CVE-2018-20434 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~67% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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