Check Point Advisories

OpenSSL Buffer Overflow (CVE-2025-11187)

Vulnerability
Protection

Check Point Reference:	CPAI-2025-17853
Date Published:	5 Jul 2026
Severity:	High
Last Updated:	Sunday 05 July, 2026
Source:
Industry Reference:	CVE-2025-11187
Protection Provided by:	Security Gateway R81, R80
Who is Vulnerable?	OpenSSL 3.4.0 and later, prior to 3.4.4 OpenSSL 3.5.0 and later, prior to 3.5.5 OpenSSL 3.6.0 and later, prior to 3.6.1
Vulnerability Description	A buffer overflow vulnerability in OpenSSL allows attackers to cause a denial-of-service condition or potentially execute arbitrary code by exploiting missing validation in PBMAC1 parameters in PKCS#12 files. This issue arises when processing maliciously crafted PKCS#12 files, where the PBKDF2 salt and keylength parameters are used without validation, leading to a stack-based buffer overflow or NULL pointer dereference. Exploitation requires user interaction and processing of untrusted PKCS#12 files.

Protection Overview

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.

Security Gateway R80

In the IPS tab, click Protections and find the OpenSSL Buffer Overflow (CVE-2025-11187) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: OpenSSL Enforcement Violation.
Attack Information: OpenSSL Buffer Overflow (CVE-2025-11187)