MSRC_CVE-2021-3470

Vulnerability from csaf_microsoft - Published: 2021-03-02 00:00 - Updated: 2023-03-10 00:00
Summary
A heap overflow issue was found in Redis in versions before 5.0.10 before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users who use jemalloc or glibc malloc.

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-2021-3470 A heap overflow issue was found in Redis in versions before 5.0.10 before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc\u0027s malloc leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users who use jemalloc or glibc malloc. - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-3470.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": "A heap overflow issue was found in Redis in versions before 5.0.10 before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc\u0027s malloc leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users who use jemalloc or glibc malloc.",
    "tracking": {
      "current_release_date": "2023-03-10T00:00:00.000Z",
      "generator": {
        "date": "2025-10-19T21:50:22.140Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2021-3470",
      "initial_release_date": "2021-03-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2021-04-06T00:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2021-12-16T00:00:00.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added redis to CBL-Mariner 2.0"
        },
        {
          "date": "2023-03-10T00:00:00.000Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "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_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003ccm1 redis 5.0.5-7",
                "product": {
                  "name": "\u003ccm1 redis 5.0.5-7",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version",
                "name": "cm1 redis 5.0.5-7",
                "product": {
                  "name": "cm1 redis 5.0.5-7",
                  "product_id": "19068"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003ccbl2 redis 5.0.5-7",
                "product": {
                  "name": "\u003ccbl2 redis 5.0.5-7",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 redis 5.0.5-7",
                "product": {
                  "name": "cbl2 redis 5.0.5-7",
                  "product_id": "19069"
                }
              }
            ],
            "category": "product_name",
            "name": "redis"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccm1 redis 5.0.5-7 as a component of CBL Mariner 1.0",
          "product_id": "16820-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "16820"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cm1 redis 5.0.5-7 as a component of CBL Mariner 1.0",
          "product_id": "19068-16820"
        },
        "product_reference": "19068",
        "relates_to_product_reference": "16820"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
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          "product_id": "17086-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 redis 5.0.5-7 as a component of CBL Mariner 2.0",
          "product_id": "19069-17086"
        },
        "product_reference": "19069",
        "relates_to_product_reference": "17086"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-3470",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "notes": [
        {
          "category": "general",
          "text": "redhat",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "19068-16820",
          "19069-17086"
        ],
        "known_affected": [
          "16820-2",
          "17086-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2021-3470 A heap overflow issue was found in Redis in versions before 5.0.10 before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc\u0027s malloc leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users who use jemalloc or glibc malloc. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-3470.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-04-06T00:00:00.000Z",
          "details": "5.0.5-7:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "16820-2",
            "17086-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 5.3,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "16820-2",
            "17086-1"
          ]
        }
      ],
      "title": "A heap overflow issue was found in Redis in versions before 5.0.10 before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc\u0027s malloc leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users who use jemalloc or glibc malloc."
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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