CVE-2025-34071

Description

A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access to upload and execute arbitrary code through the firmware upgrade feature. The system upgrade mechanism accepts unsigned .img files, which can be modified to include malicious scripts within the upgrade.sh or disk image components. These modified upgrade images are not validated for authenticity or integrity, and are executed by the system post-upload, enabling root access.

CVSS v3.1 Score

9.8

CRITICAL

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

Weakness Type (CWE)

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
gfi	kerio_control	All

References

Exploits

https://ssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rce/

Other References

https://vulncheck.com/advisories/gfi-kerio-control-auth-bypass-rce

Frequently Asked Questions

What is CVE-2025-34071? +

A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access to upload and execute arbitrary code through the firmware upgrade feature. The system upgrade mechanism accepts unsigned .img files, which can be modified to include malicious scripts within the upgrade.sh or disk image components. These modified upgrade images are not validated for authenticity or integrity, and are executed by the system post-upload, enabling root access. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-34071? +

CVE-2025-34071 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-34071? +

CVE-2025-34071 affects products from gfi, specifically: kerio_control. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-34071? +

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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