Critical severity · published Apr 24, 2019
CVE-2018-20434
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,…
9.8
CVSS
71.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)71.5% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Librenms · Librenms
1.46 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20434
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-20434
packetstormsecurity.com
http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html
packetstormsecurity.com
http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html
Permissions Required
https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing
Exploit
https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372d
Exploit
https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434/
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