msrc_cve-2022-46392
Vulnerability from csaf_microsoft
Published
2022-12-02 00:00
Modified
2023-01-17 00:00
Summary
An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.

Notes

Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.


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{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2022-46392 An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller. - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2022-46392.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.",
    "tracking": {
      "current_release_date": "2023-01-17T00:00:00.000Z",
      "generator": {
        "date": "2025-10-20T00:09:03.026Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2022-46392",
      "initial_release_date": "2022-12-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2023-01-17T00:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "1.0",
                "product": {
                  "name": "CBL Mariner 1.0",
                  "product_id": "16820"
                }
              },
              {
                "category": "product_version",
                "name": "2.0",
                "product": {
                  "name": "CBL Mariner 2.0",
                  "product_id": "17086"
                }
              },
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003ccm1 fluent-bit 1.5.2-3",
                "product": {
                  "name": "\u003ccm1 fluent-bit 1.5.2-3",
                  "product_id": "3"
                }
              },
              {
                "category": "product_version",
                "name": "cm1 fluent-bit 1.5.2-3",
                "product": {
                  "name": "cm1 fluent-bit 1.5.2-3",
                  "product_id": "18492"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003ccbl2 fluent-bit 2.0.9-1",
                "product": {
                  "name": "\u003ccbl2 fluent-bit 2.0.9-1",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 fluent-bit 2.0.9-1",
                "product": {
                  "name": "cbl2 fluent-bit 2.0.9-1",
                  "product_id": "18493"
                }
              }
            ],
            "category": "product_name",
            "name": "fluent-bit"
          },
          {
            "category": "product_name",
            "name": "cbl2 qemu 6.2.0-24",
            "product": {
              "name": "cbl2 qemu 6.2.0-24",
              "product_id": "1"
            }
          },
          {
            "category": "product_name",
            "name": "azl3 qemu 8.2.0-16",
            "product": {
              "name": "azl3 qemu 8.2.0-16",
              "product_id": "4"
            }
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccm1 fluent-bit 1.5.2-3 as a component of CBL Mariner 1.0",
          "product_id": "16820-3"
        },
        "product_reference": "3",
        "relates_to_product_reference": "16820"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cm1 fluent-bit 1.5.2-3 as a component of CBL Mariner 1.0",
          "product_id": "18492-16820"
        },
        "product_reference": "18492",
        "relates_to_product_reference": "16820"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccbl2 fluent-bit 2.0.9-1 as a component of CBL Mariner 2.0",
          "product_id": "17086-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 fluent-bit 2.0.9-1 as a component of CBL Mariner 2.0",
          "product_id": "18493-17086"
        },
        "product_reference": "18493",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 qemu 6.2.0-24 as a component of CBL Mariner 2.0",
          "product_id": "17086-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 qemu 8.2.0-16 as a component of Azure Linux 3.0",
          "product_id": "17084-4"
        },
        "product_reference": "4",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2022-46392",
      "cwe": {
        "id": "CWE-203",
        "name": "Observable Discrepancy"
      },
      "flags": [
        {
          "label": "component_not_present",
          "product_ids": [
            "17084-4"
          ]
        },
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "17086-1"
          ]
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "mitre",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "18492-16820",
          "18493-17086"
        ],
        "known_affected": [
          "16820-3",
          "17086-2"
        ],
        "known_not_affected": [
          "17086-1",
          "17084-4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2022-46392 An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2022-46392.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-01-17T00:00:00.000Z",
          "details": "1.5.2-3:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "16820-3"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        },
        {
          "category": "vendor_fix",
          "date": "2023-01-17T00:00:00.000Z",
          "details": "2.0.9-1:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17086-2"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 5.3,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "16820-3",
            "17086-2"
          ]
        }
      ],
      "title": "An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller."
    }
  ]
}


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