PT-2019-10067 · Librenms · Librenms

Askar · Published 2019-04-24 · Updated 2022-05-24 · CVE-2018-20434

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: LibreNMS version 1.46

Description: The issue allows remote attackers to execute arbitrary OS commands. This is achieved by using the community parameter in the html/pages/addhost.inc.php page during the creation of a new device. Then, by making a request to the /ajax output.php?id=capture&format=text&type=snmpwalk&hostname=localhost endpoint, it triggers command mishandling in html/includes/output/capture.inc.php.

Recommendations: For LibreNMS version 1.46, as a temporary workaround, consider restricting access to the html/pages/addhost.inc.php page and the /ajax output.php endpoint to minimize the risk of exploitation. Avoid using the community parameter in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2018-20434

GHSA-62Q7-QJ6G-GVR7

Affected Products

Librenms

References · 13

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/librenms_addhost_cmd_inject.rb · Exploit
• 🔥 https://github.com/mhaskar/CVE-2018-20434 · Exploit
• 🔥 https://exploit-db.com/exploits/47044 · Exploit
• 🔥 https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434 · Exploit
• 🔥 https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372d · Exploit
• 🔥 https://exploit-db.com/exploits/46970 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2018-20434 · Security Note
• https://osv.dev/vulnerability/GHSA-62q7-qj6g-gvr7 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-20434 · Vendor Advisory
• https://github.com/librenms/librenms · Note
• http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html · Note
• http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html · Note
• https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing · Note