Vulnerability identifier: #VU32720

Vulnerability risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15877

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LibreNMS
Other software / Other software solutions

Vendor: LibreNMS Project

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions for normal users because of "'guard' => 'admin'" instead of "'middleware' => ['can:admin']" in routes/web.php. A remote authenticated attacker can bypass implemented security restrictions and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LibreNMS: 0.1 - 1.65

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External links
http://community.librenms.org/c/announcements
http://github.com/librenms/librenms/commit/e5bb6d80bc308fc56b9a01ffb76c34159995353c
http://github.com/librenms/librenms/compare/1.65...1.65.1
http://github.com/librenms/librenms/pull/11915
http://github.com/librenms/librenms/releases/tag/1.65.1
http://shielder.it/blog

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.