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openssl — security advisory

Type: advisorySources: OSVAdvisory ID: ALPINE-CVE-2023-5363

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 applica

Products
openssl
Affected versions
Not specified
Fixed versions
3.0.12-r0, 3.1.4-r0
CVEs
CVE-2023-5363
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 15:05 UTC · Revision 1

Source evidence

ALPINE-CVE-2023-5363

core-osv · Original source

Published 25 Oct 2023, 18:17 UTC

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 applica

osv:ALPINE-CVE-2023-5363

openssl

Fixed versions: 3.0.12-r0

openssl

Fixed versions: 3.1.4-r0

openssl

Fixed versions: 3.1.4-r0

openssl

Fixed versions: 3.1.4-r0

openssl

Fixed versions: 3.1.4-r0

openssl

Fixed versions: 3.1.4-r0

openssl

Fixed versions: 3.1.4-r0

openssl

Fixed versions: 3.1.4-r0

Complete source record
{
  "id": "94fad617fd1b8e3b4976f1a7684ff4340a0137144e3321247c3d13bd4728d779",
  "url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-5363",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ALPINE-CVE-2023-5363",
    "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, 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 applica",
    "evidence": "osv:ALPINE-CVE-2023-5363",
    "products": [
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        "name": {
          "value": "openssl",
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      {
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      {
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      {
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          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "ALPINE-CVE-2023-5363",
      "aliases": [
        "ALPINE-CVE-2023-5363"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "3.0.0"
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                }
              ]
            }
          ],
          "package": {
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            "purl": "pkg:apk/alpine/openssl?arch=source",
            "ecosystem": "Alpine:v3.17"
          },
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          },
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          ],
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              ]
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          ],
          "package": {
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            "purl": "pkg:apk/alpine/openssl?arch=source",
            "ecosystem": "Alpine:v3.20"
          },
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          "ecosystem_specific": {}
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              ]
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          ],
          "package": {
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            "purl": "pkg:apk/alpine/openssl?arch=source",
            "ecosystem": "Alpine:v3.21"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-5363.json"
          },
          "ecosystem_specific": {}
        },
        {
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            {
              "type": "ECOSYSTEM",
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              ]
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          ],
          "package": {
            "name": "openssl",
            "purl": "pkg:apk/alpine/openssl?arch=source",
            "ecosystem": "Alpine:v3.22"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-5363.json"
          },
          "ecosystem_specific": {}
        },
        {
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              "type": "ECOSYSTEM",
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                },
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                }
              ]
            }
          ],
          "package": {
            "name": "openssl",
            "purl": "pkg:apk/alpine/openssl?arch=source",
            "ecosystem": "Alpine:v3.23"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-5363.json"
          },
          "ecosystem_specific": {}
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
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                {
                  "introduced": "3.0.0"
                },
                {
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                }
              ]
            }
          ],
          "package": {
            "name": "openssl",
            "purl": "pkg:apk/alpine/openssl?arch=source",
            "ecosystem": "Alpine:v3.24"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-5363.json"
          },
          "ecosystem_specific": {}
        }
      ],
      "modified": "2026-10-26T17:17:58.663166841Z",
      "provider": "osv",
      "upstream": [
        "CVE-2023-5363"
      ],
      "references": [
        "https://security.alpinelinux.org/vuln/CVE-2023-5363"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2023-5363",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 454578,
  "published_at": "2023-10-25T18:17:43.613+00:00"
}