Vulnerability CVE-2018-20434
Published: 2019-04-24

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.

See advisories in our WLB2 database:
Topic
Author
Date
High
LibreNMS 1.46 addhost Remote Code Execution
Askar
28.06.2019

Type:

CWE-78

 (Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') )

CVSS2 => (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
10/10
10/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Librenms -> Librenms 

 References:
http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.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/
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