---
schema_version: '1.0'
id: security-20260705-490383
url: https://osv.dev/vulnerability/DEBIAN-CVE-2023-5363
url_hash: 49038310ca44246c766b7bd76cf5bfcb7d5c062a365d4c58c1f2b66742af3cb3
canonical_url: https://osv.dev/vulnerability/DEBIAN-CVE-2023-5363
source: osv:debian
category: security/os
category_raw: cve/os
region: null
tags:
- cve
- DEBIAN-CVE-2023-5363
- severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- openssl
- Debian
lang: en
published_at: '2023-10-25T18:17:43Z'
fetched_at: '2026-07-05T15:34:33Z'
updated_at: '2026-07-05T15:35:24Z'
status: published
content_hash: aea73c0c8750263ea03a25b7b7593c19f2239ad057a19645741597d536236d29
license_note: full
summary: 'Issue summary: A bug has been identified in the processing of key and initialisation
  vector (IV) lengths.  This can lead to potential truncation or overruns during the
  initialisation of some symmetric ciphers.  Impact summary: A truncation in the IV
  can result in non-uniqueness, '
summary_source: rss
summary_en: 'Issue summary: A bug has been identified in the processing of key and
  initialisation vector (IV) lengths.  This can lead to potential truncation or overruns
  during the initialisation of some symmetric ciphers.  Impact summary: A truncation
  in the IV can result in non-uniqueness, '
entities: []
key_facts: []
related: []
related_auto: []
title: DEBIAN-CVE-2023-5363 — openssl
---

# DEBIAN-CVE-2023-5363 — openssl

## TL;DR
Issue summary: A bug has been identified in the processing of key and initialisation vector (IV) lengths.  This can lead to potential truncation or overruns during the initialisation of some symmetric ciphers.  Impact summary: A truncation in the IV can result in non-uniqueness, 

## Key Points
- cve / DEBIAN-CVE-2023-5363 / severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N / openssl / Debian

## Details
**Severity:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
**Advisory:** DEBIAN-CVE-2023-5363

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

**Details:**
Issue summary: A bug has been identified in the processing of key and initialisation vector (IV) lengths.  This can lead to potential truncation or overruns during the initialisation of some symmetric ciphers.  Impact summary: A truncation in the IV can result in non-uniqueness, which could result in loss of confidentiality for some cipher modes.  When calling EVP_EncryptInit_ex2(), EVP_DecryptInit_ex2() or EVP_CipherInit_ex2() the provided OSSL_PARAM array is processed after the key and IV have been established.  Any alterations to the key length, via the "keylen" parameter or the IV length, via the "ivlen" parameter, within the OSSL_PARAM array will not take effect as intended, potentially causing truncation or overreading of these values.  The following ciphers and cipher modes are impacted: RC2, RC4, RC5, CCM, GCM and OCB.  For the CCM, GCM and OCB cipher modes, truncation of the IV can result in loss of confidentiality.  For example, when following NIST's SP 800-38D section 8.2.1 guidance for constructing a deterministic IV for AES in GCM mode, truncation of the counter portion could lead to IV reuse.  Both truncations and overruns of the key and overruns of the IV will produce incorrect results and could, in some cases, trigger a memory exception.  However, these issues are not currently assessed as security critical.  Changing the key and/or IV lengths is not considered to be a common operation and the vulnerable API was recently introduced. Furthermore it is likely that application developers will have spotted this problem during testing since decryption would fail unless both peers in the communication were similarly vulnerable. For these reasons we expect the probability of an application being vulnerable to this to be quite low. However if an application is vulnerable then this issue is considered very serious. For these reasons we have assessed this issue as Moderate severity overall.  The OpenSSL SSL/TLS implementation is not affected by this issue.  The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this because the issue lies outside of the FIPS provider boundary.  OpenSSL 3.1 and 3.0 are vulnerable to this issue.

**References:**
- https://security-tracker.debian.org/tracker/CVE-2023-5363

_Data: OSV.dev (upstream: debian) — https://osv.dev/vulnerability/DEBIAN-CVE-2023-5363_

## Source
元記事: [DEBIAN-CVE-2023-5363 — openssl](https://osv.dev/vulnerability/DEBIAN-CVE-2023-5363) — published 2023-10-25T18:17:43Z