---
schema_version: '1.0'
id: security-20260705-1065f4
url: https://osv.dev/vulnerability/DEBIAN-CVE-2025-69420
url_hash: 1065f47f900effadd956471d2bbec713ab7e6e3f348550401836c21866a97f77
canonical_url: https://osv.dev/vulnerability/DEBIAN-CVE-2025-69420
source: osv:debian
category: security/os
category_raw: cve/os
region: null
tags:
- cve
- DEBIAN-CVE-2025-69420
- severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- openssl
- Debian
lang: en
published_at: '2026-01-27T16:16:34Z'
fetched_at: '2026-07-05T15:34:34Z'
updated_at: '2026-07-05T15:35:57Z'
status: published
content_hash: 4eb26723c2ec46fc0395413696b40cebf0d711a527517c5b5aee7c6a5b66f455
license_note: full
summary: 'Issue summary: A type confusion vulnerability exists in the TimeStamp Response
  verification code where an ASN1_TYPE union member is accessed without first validating
  the type, causing an invalid or NULL pointer dereference when processing a malformed
  TimeStamp Response file.  Imp'
summary_source: rss
summary_en: 'Issue summary: A type confusion vulnerability exists in the TimeStamp
  Response verification code where an ASN1_TYPE union member is accessed without first
  validating the type, causing an invalid or NULL pointer dereference when processing
  a malformed TimeStamp Response file.  Imp'
entities: []
key_facts: []
related: []
related_auto: []
title: DEBIAN-CVE-2025-69420 — openssl
---

# DEBIAN-CVE-2025-69420 — openssl

## TL;DR
Issue summary: A type confusion vulnerability exists in the TimeStamp Response verification code where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing a malformed TimeStamp Response file.  Imp

## Key Points
- cve / DEBIAN-CVE-2025-69420 / severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H / openssl / Debian

## Details
**Severity:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
**Advisory:** DEBIAN-CVE-2025-69420

**Affected (your watchlist):**
- `Debian:openssl` 3.0.11-1~deb12u2 → no fixed version listed [rpi]

**Details:**
Issue summary: A type confusion vulnerability exists in the TimeStamp Response verification code where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing a malformed TimeStamp Response file.  Impact summary: An application calling TS_RESP_verify_response() with a malformed TimeStamp Response can be caused to dereference an invalid or NULL pointer when reading, resulting in a Denial of Service.  The functions ossl_ess_get_signing_cert() and ossl_ess_get_signing_cert_v2() access the signing cert attribute value without validating its type. When the type is not V_ASN1_SEQUENCE, this results in accessing invalid memory through the ASN1_TYPE union, causing a crash.  Exploiting this vulnerability requires an attacker to provide a malformed TimeStamp Response to an application that verifies timestamp responses. The TimeStamp protocol (RFC 3161) is not widely used and the impact of the exploit is just a Denial of Service. For these reasons the issue was assessed as Low severity.  The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the TimeStamp Response implementation is outside the OpenSSL FIPS module boundary.  OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.  OpenSSL 1.0.2 is not affected by this issue.

**References:**
- https://security-tracker.debian.org/tracker/CVE-2025-69420

_Data: OSV.dev (upstream: debian) — https://osv.dev/vulnerability/DEBIAN-CVE-2025-69420_

## Source
元記事: [DEBIAN-CVE-2025-69420 — openssl](https://osv.dev/vulnerability/DEBIAN-CVE-2025-69420) — published 2026-01-27T16:16:34Z