Stack-based buffer overflow in Kerio Connect - CVE-2023-25267
Published: June 8, 2025
Vulnerability identifier: #VU110640
CSH Severity: High
CVSS v4: 8.7 [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]
CVE-ID: CVE-2023-25267
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Kerio Connect
How to mitigate CVE-2023-25267
Install update from vendor's website.
Kerio Connect - update to 10.0.0