A vulnerability was found in OPNsense up to 23.6. It has been declared as critical. This vulnerability affects an unknown part of the file diag_backup.php of the component Backup Configuration File Handler. The manipulation with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A command injection vulnerability in the component diag_backup.php of OPNsense before 23.7 allows attackers to execute arbitrary commands via a crafted backup configuration file.

The weakness was published 08/10/2023. The advisory is shared for download at logicaltrust.net. This vulnerability was named CVE-2023-39001 since 07/25/2023. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

By approaching the search of inurl:diag_backup.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 23.7 eliminates this vulnerability. Applying the patch e800097d0c287bb665f0751a98a67c75ef7b45e5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Productinfo

Name

• OPNsense

Version

• 23.0
• 23.1
• 23.2
• 23.3
• 23.4
• 23.5
• 23.6

License

• open-source

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• 🔍
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CPE 2.2info

• 🔍
• 🔍
• 🔍

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