msrc_cve-2025-21605
Vulnerability from csaf_microsoft
Published
2025-04-02 00:00
Modified
2025-04-29 00:00
Summary
Redis DoS Vulnerability due to unlimited growth of output buffers abused by unauthenticated client

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-2025-21605 Redis DoS Vulnerability due to unlimited growth of output buffers abused by unauthenticated client - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-21605.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": "Redis DoS Vulnerability due to unlimited growth of output buffers abused by unauthenticated client",
    "tracking": {
      "current_release_date": "2025-04-29T00:00:00.000Z",
      "generator": {
        "date": "2025-10-20T03:11:13.599Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2025-21605",
      "initial_release_date": "2025-04-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2025-04-29T00:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "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": "cbl2 redis 6.2.18-3",
                "product": {
                  "name": "cbl2 redis 6.2.18-3",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version_range",
                "name": "cbl2 redis 6.2.20-1",
                "product": {
                  "name": "cbl2 redis 6.2.20-1",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "redis"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003cazl3 valkey 8.0.3-1",
                "product": {
                  "name": "\u003cazl3 valkey 8.0.3-1",
                  "product_id": "3"
                }
              },
              {
                "category": "product_version",
                "name": "azl3 valkey 8.0.3-1",
                "product": {
                  "name": "azl3 valkey 8.0.3-1",
                  "product_id": "19284"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003cazl3 valkey 8.0.2-1",
                "product": {
                  "name": "\u003cazl3 valkey 8.0.2-1",
                  "product_id": "4"
                }
              },
              {
                "category": "product_version",
                "name": "azl3 valkey 8.0.2-1",
                "product": {
                  "name": "azl3 valkey 8.0.2-1",
                  "product_id": "17493"
                }
              }
            ],
            "category": "product_name",
            "name": "valkey"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 redis 6.2.18-3 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 redis 6.2.20-1 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": "\u003cazl3 valkey 8.0.3-1 as a component of Azure Linux 3.0",
          "product_id": "17084-3"
        },
        "product_reference": "3",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 valkey 8.0.3-1 as a component of Azure Linux 3.0",
          "product_id": "19284-17084"
        },
        "product_reference": "19284",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003cazl3 valkey 8.0.2-1 as a component of Azure Linux 3.0",
          "product_id": "17084-4"
        },
        "product_reference": "4",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 valkey 8.0.2-1 as a component of Azure Linux 3.0",
          "product_id": "17493-17084"
        },
        "product_reference": "17493",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-21605",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "general",
          "text": "GitHub_M",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "19284-17084",
          "17493-17084"
        ],
        "known_affected": [
          "17086-2",
          "17086-1",
          "17084-3",
          "17084-4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-21605 Redis DoS Vulnerability due to unlimited growth of output buffers abused by unauthenticated client - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-21605.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-04-29T00:00:00.000Z",
          "details": "8.0.3-1:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17084-3",
            "17084-4"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 7.5,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "17086-2",
            "17086-1",
            "17084-3",
            "17084-4"
          ]
        }
      ],
      "title": "Redis DoS Vulnerability due to unlimited growth of output buffers abused by unauthenticated client"
    }
  ]
}


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