CVE-2025-69420

A flaw was found in OpenSSL. A type confusion vulnerability exists in the TimeStamp Response verification code, where an ASN1_TYPE union member is accessed without proper type validation. A remote attacker can exploit this by providing a malformed TimeStamp Response to an application that verifies timestamp responses. This can lead to an invalid or NULL pointer dereference, resulting in a Denial of Service (DoS) due to an application crash.

This vulnerability is rated Low for Red Hat products. A type confusion flaw in the TimeStamp Response verification code can lead to a Denial of Service when processing a specially crafted TimeStamp Response. Exploitation requires an application to call TS_RESP_verify_response() with a malformed response, and the TimeStamp protocol (RFC 3161) is not widely used. Red Hat FIPS modules are not affected as the TimeStamp Response implementation is outside the FIPS module boundary.

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.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.