CVE-2025-11187

A flaw was found in OpenSSL. When an application processes a maliciously crafted PKCS#12 file, an attacker can exploit a stack buffer overflow or a NULL pointer dereference. This can lead to a denial of service (DoS) by crashing the application, and in some cases, may enable arbitrary code execution. The vulnerability arises from the lack of validation for PBKDF2 salt and keylength parameters within the PKCS#12 file.

This vulnerability is rated Moderate for Red Hat. It affects OpenSSL versions 3.6, 3.5, and 3.4, where improper validation of PBMAC1 parameters in PKCS#12 MAC verification can lead to a stack buffer overflow or NULL pointer dereference. Exploitation requires an application to process a maliciously crafted PKCS#12 file, which is uncommon as these files are typically trusted. OpenSSL versions 3.3, 3.0, 1.1.1, and 1.0.2 are not affected as they do not support PBMAC1 in PKCS#12.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, avoid processing untrusted PKCS#12 files. Applications should only handle PKCS#12 files from trusted sources, as these files are typically used for storing private keys and are expected to be secure.