---
schema_version: '1.0'
id: security-20260705-40b216
url: https://osv.dev/vulnerability/DEBIAN-CVE-2025-27587
url_hash: 40b216e2c8c789a7038fffba2a2f5f2755ace27dd7115bdb2e070db2801d8cd7
canonical_url: https://osv.dev/vulnerability/DEBIAN-CVE-2025-27587
source: osv:debian
category: security/os
category_raw: cve/os
region: null
tags:
- cve
- DEBIAN-CVE-2025-27587
- severity:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- openssl
- Debian
lang: en
published_at: '2025-06-16T22:15:44Z'
fetched_at: '2026-07-05T15:34:34Z'
updated_at: '2026-07-05T15:35:57Z'
status: published
content_hash: 40a7f64af631e494202545b12bb1b5b9b199ebd1d9ca2f61606fdfcea55bd4d8
license_note: full
summary: 'OpenSSL 3.0.0 through 3.3.2 on the PowerPC architecture is vulnerable to
  a Minerva attack, exploitable by measuring the time of signing of random messages
  using the EVP_DigestSign API, and then using the private key to extract the K value
  (nonce) from the signatures. Next, based '
summary_source: rss
summary_en: 'OpenSSL 3.0.0 through 3.3.2 on the PowerPC architecture is vulnerable
  to a Minerva attack, exploitable by measuring the time of signing of random messages
  using the EVP_DigestSign API, and then using the private key to extract the K value
  (nonce) from the signatures. Next, based '
entities: []
key_facts: []
related: []
related_auto: []
title: DEBIAN-CVE-2025-27587 — openssl
---

# DEBIAN-CVE-2025-27587 — openssl

## TL;DR
OpenSSL 3.0.0 through 3.3.2 on the PowerPC architecture is vulnerable to a Minerva attack, exploitable by measuring the time of signing of random messages using the EVP_DigestSign API, and then using the private key to extract the K value (nonce) from the signatures. Next, based 

## Key Points
- cve / DEBIAN-CVE-2025-27587 / severity:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N / openssl / Debian

## Details
**Severity:** CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
**Advisory:** DEBIAN-CVE-2025-27587

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

**Details:**
OpenSSL 3.0.0 through 3.3.2 on the PowerPC architecture is vulnerable to a Minerva attack, exploitable by measuring the time of signing of random messages using the EVP_DigestSign API, and then using the private key to extract the K value (nonce) from the signatures. Next, based on the bit size of the extracted nonce, one can compare the signing time of full-sized nonces to signatures that used smaller nonces, via statistical tests. There is a side-channel in the P-364 curve that allows private key extraction (also, there is a dependency between the bit size of K and the size of the side channel). NOTE: This CVE is disputed because the OpenSSL security policy explicitly notes that any side channels which require same physical system to be detected are outside of the threat model for the software. The timing signal is so small that it is infeasible to be detected without having the attacking process running on the same physical system.

**References:**
- https://security-tracker.debian.org/tracker/CVE-2025-27587

_Data: OSV.dev (upstream: debian) — https://osv.dev/vulnerability/DEBIAN-CVE-2025-27587_

## Source
元記事: [DEBIAN-CVE-2025-27587 — openssl](https://osv.dev/vulnerability/DEBIAN-CVE-2025-27587) — published 2025-06-16T22:15:44Z