---
schema_version: '1.0'
id: security-20260705-096bca
url: https://osv.dev/vulnerability/DEBIAN-CVE-2024-4603
url_hash: 096bca144637f5a1243616427e3ad0426764f8fc3362df3b8ad9c57abfd64651
canonical_url: https://osv.dev/vulnerability/DEBIAN-CVE-2024-4603
source: osv:debian
category: security/os
category_raw: cve/os
region: null
tags:
- cve
- DEBIAN-CVE-2024-4603
- severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- openssl
- Debian
lang: en
published_at: '2024-05-16T16:15:10Z'
fetched_at: '2026-07-05T15:34:33Z'
updated_at: '2026-07-05T15:35:24Z'
status: published
content_hash: 8ae75d5d3817bb3a29750f9fbe4ef7dd935a1a46907ee780f05dae6a56739c57
license_note: full
summary: 'Issue summary: Checking excessively long DSA keys or parameters may be very
  slow.  Impact summary: Applications that use the functions EVP_PKEY_param_check()
  or EVP_PKEY_public_check() to check a DSA public key or DSA parameters may experience
  long delays. Where the key or parame'
summary_source: rss
summary_en: 'Issue summary: Checking excessively long DSA keys or parameters may be
  very slow.  Impact summary: Applications that use the functions EVP_PKEY_param_check()
  or EVP_PKEY_public_check() to check a DSA public key or DSA parameters may experience
  long delays. Where the key or parame'
entities: []
key_facts: []
related: []
related_auto: []
title: DEBIAN-CVE-2024-4603 — openssl
---

# DEBIAN-CVE-2024-4603 — openssl

## TL;DR
Issue summary: Checking excessively long DSA keys or parameters may be very slow.  Impact summary: Applications that use the functions EVP_PKEY_param_check() or EVP_PKEY_public_check() to check a DSA public key or DSA parameters may experience long delays. Where the key or parame

## Key Points
- cve / DEBIAN-CVE-2024-4603 / severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L / openssl / Debian

## Details
**Severity:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
**Advisory:** DEBIAN-CVE-2024-4603

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

**Details:**
Issue summary: Checking excessively long DSA keys or parameters may be very slow.  Impact summary: Applications that use the functions EVP_PKEY_param_check() or EVP_PKEY_public_check() to check a DSA public key or DSA parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service.  The functions EVP_PKEY_param_check() or EVP_PKEY_public_check() perform various checks on DSA parameters. Some of those computations take a long time if the modulus (`p` parameter) is too large.  Trying to use a very large modulus is slow and OpenSSL will not allow using public keys with a modulus which is over 10,000 bits in length for signature verification. However the key and parameter check functions do not limit the modulus size when performing the checks.  An application that calls EVP_PKEY_param_check() or EVP_PKEY_public_check() and supplies a key or parameters obtained from an untrusted source could be vulnerable to a Denial of Service attack.  These functions are not called by OpenSSL itself on untrusted DSA keys so only applications that directly call these functions may be vulnerable.  Also vulnerable are the OpenSSL pkey and pkeyparam command line applications when using the `-check` option.  The OpenSSL SSL/TLS implementation is not affected by this issue.  The OpenSSL 3.0 and 3.1 FIPS providers are affected by this issue.

**References:**
- https://security-tracker.debian.org/tracker/CVE-2024-4603

_Data: OSV.dev (upstream: debian) — https://osv.dev/vulnerability/DEBIAN-CVE-2024-4603_

## Source
元記事: [DEBIAN-CVE-2024-4603 — openssl](https://osv.dev/vulnerability/DEBIAN-CVE-2024-4603) — published 2024-05-16T16:15:10Z