Vulnerability identifier: #VU18157

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-9166

CWE-ID: CWE-276

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
Nagios XI
Server applications / Other server solutions

Vendor: nagios.org

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for "config.inc.php" and "import_xiconfig.php" files. A local user with access to the system can modify files and execute arbitrary code on the system with root privleges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nagios XI: 5.2.0 - 5.5.10

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External links
http://www.nagios.com/downloads/nagios-xi/change-log/
http://www.nagios.com/products/security/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.