Stack-based buffer overflow in Kerio Connect - CVE-2023-25267
Published: June 8, 2025
Vulnerability identifier: #VU110640
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2023-25267
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GFI Software
Affected software:
Kerio Connect
Kerio Connect
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the 2FASetup function when processing an authenticated request with a long primaryEMailAddress field to the webmail/api/jsonrpc URI. A remote authenticated user can send a specially crafted HTTP request to the webmail interface, trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2023-25267
Install update from vendor's website.