CVE-2020-36863: nagios xi File Upload RCE (CVSS 8.8)

Description

Nagios XI versions prior to 5.7.2 allow PHP files to be uploaded to the Audio Import directory and executed from that location. The upload handler did not properly restrict file types or enforce storage outside of the webroot, and the web server permitted execution within the upload directory. An authenticated attacker with access to the audio import feature could upload a crafted PHP file and then request it to achieve remote code execution with the privileges of the application service.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-434 Unrestricted Upload

Affected Products

Vendor	Product	Versions
nagios	nagios_xi	< 5.7.2

References

Other References

https://www.nagios.com/changelog/nagios-xi/ https://www.vulncheck.com/advisories/nagios-xi-unrestricted-file-upload-via-audio-import-directory

Frequently Asked Questions

What is CVE-2020-36863? +

Nagios XI versions prior to 5.7.2 allow PHP files to be uploaded to the Audio Import directory and executed from that location. The upload handler did not properly restrict file types or enforce storage outside of the webroot, and the web server permitted execution within the upload directory. An authenticated attacker with access to the audio import feature could upload a crafted PHP file and then request it to achieve remote code execution with the privileges of the application service. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2020-36863? +

CVE-2020-36863 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2020-36863? +

CVE-2020-36863 affects products from nagios, specifically: nagios_xi. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2020-36863? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2020-36863