|Check Point Reference:||CPAI-2017-0835|
|Date Published:||15 Oct 2017|
|Last Updated:||23 Oct 2017|
|Protection Provided by:||
|Who is Vulnerable?|| OpenVPN Project OpenVPN 2.3.x prior to 2.3.18 |
OpenVPN Project OpenVPN 2.4.x prior to 2.4.4
|Vulnerability Description||A stack-based buffer overflow vulnerability exists in OpenVPN. The vulnerability is due to a lack of bounds check on the length of key and HMAC lengths provided by the client. A remote, unauthenticated attacker can exploit this vulnerability by sending a crafted P_CONTROL_V1 message to a target server.|
This protection detects attempts to exploit this vulnerability.
In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.
This protection's log will contain the following information:
Attack Name: SSL Enforcement Violation.
Attack Information: OpenVPN read_key Stack Based Buffer Overflow