{
  "document": {
    "aggregate_severity": {
      "text": "Medium"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/ubuntu20.04els/vex/2022/cve-2022-4304-els_os-ubuntu20_04els.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-04-20T12:25:25Z",
      "generator": {
        "date": "2026-04-20T12:25:25Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2022-4304-ELS_OS-UBUNTU20.04ELS",
      "initial_release_date": "2022-01-01T00:00:00Z",
      "revision_history": [
        {
          "date": "2022-01-01T00:00:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-04-20T12:25:25Z",
          "number": "2",
          "summary": "Official Publication"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "Security update on CVE-2022-4304"
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Ubuntu 20.04",
                "product": {
                  "name": "Ubuntu 20.04",
                  "product_id": "Ubuntu-20",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Ubuntu"
          }
        ],
        "category": "vendor",
        "name": "Canonical Ltd."
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64",
                "product": {
                  "name": "libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64",
                  "product_id": "libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64",
                  "product_identification_helper": {
                    "purl": "pkg:deb/tuxcare/libssl-dev@1.1.1f-1ubuntu2.24%2Btuxcare.els2?arch=amd64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "amd64"
          }
        ],
        "category": "vendor",
        "name": "TuxCare"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64 as a component of Ubuntu 20.04",
          "product_id": "Ubuntu-20:libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64"
        },
        "product_reference": "libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64",
        "relates_to_product_reference": "Ubuntu-20"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2022-4304",
      "cwe": {
        "id": "CWE-203",
        "name": "Observable Discrepancy"
      },
      "notes": [
        {
          "category": "description",
          "text": "A timing based side channel exists in the OpenSSL RSA Decryption implementation\nwhich could be sufficient to recover a plaintext across a network in a\nBleichenbacher style attack. To achieve a successful decryption an attacker\nwould have to be able to send a very large number of trial messages for\ndecryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5,\nRSA-OEAP and RSASVE.\n\nFor example, in a TLS connection, RSA is commonly used by a client to send an\nencrypted pre-master secret to the server. An attacker that had observed a\ngenuine connection between a client and a server could use this flaw to send\ntrial messages to the server and record the time taken to process them. After a\nsufficiently large number of messages the attacker could recover the pre-master\nsecret used for the original connection and thus be able to decrypt the\napplication data sent over that connection.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "under_investigation": [
          "Ubuntu-20:libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2022-4304"
        },
        {
          "category": "external",
          "summary": "https://security.gentoo.org/glsa/202402-08",
          "url": "https://security.gentoo.org/glsa/202402-08"
        },
        {
          "category": "external",
          "summary": "https://www.openssl.org/news/secadv/20230207.txt",
          "url": "https://www.openssl.org/news/secadv/20230207.txt"
        },
        {
          "category": "external",
          "summary": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003",
          "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003"
        }
      ],
      "release_date": "2023-02-08T20:15:00Z",
      "remediations": [
        {
          "category": "none_available",
          "details": "Affected",
          "product_ids": [
            "Ubuntu-20:libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "Ubuntu-20:libssl-dev-0:1.1.1f-1ubuntu2.24+tuxcare.els2.amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}