Vulnerability-Lookup

CNVD-2021-88723

Vulnerability from cnvd - Published: 2021-11-18

Title

BlueZ资源管理错误漏洞

Description

BlueZ是一款使用C语言编写的蓝牙协议堆栈，它主要用于提供对核心蓝牙层和协议的支持。 BlueZ中存在资源管理错误漏洞，该漏洞源于产品的gatt-database.c文件的D-Bus未能正确处理WriteValue。目前没有详细的漏洞细节提供。

Severity

中

Patch Name

BlueZ资源管理错误漏洞的补丁

Patch Description

BlueZ是一款使用C语言编写的蓝牙协议堆栈，它主要用于提供对核心蓝牙层和协议的支持。 BlueZ中存在资源管理错误漏洞，该漏洞源于产品的gatt-database.c文件的D-Bus未能正确处理WriteValue。目前没有详细的漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-43400

Impacted products

Name
Bluez Bluez 5.61

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-43400"
    }
  },
  "description": "BlueZ\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684\u84dd\u7259\u534f\u8bae\u5806\u6808\uff0c\u5b83\u4e3b\u8981\u7528\u4e8e\u63d0\u4f9b\u5bf9\u6838\u5fc3\u84dd\u7259\u5c42\u548c\u534f\u8bae\u7684\u652f\u6301\u3002\n\nBlueZ\u4e2d\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ea7\u54c1\u7684gatt-database.c\u6587\u4ef6\u7684D-Bus\u672a\u80fd\u6b63\u786e\u5904\u7406WriteValue\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-88723",
  "openTime": "2021-11-18",
  "patchDescription": "BlueZ\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684\u84dd\u7259\u534f\u8bae\u5806\u6808\uff0c\u5b83\u4e3b\u8981\u7528\u4e8e\u63d0\u4f9b\u5bf9\u6838\u5fc3\u84dd\u7259\u5c42\u548c\u534f\u8bae\u7684\u652f\u6301\u3002\r\n\r\nBlueZ\u4e2d\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ea7\u54c1\u7684gatt-database.c\u6587\u4ef6\u7684D-Bus\u672a\u80fd\u6b63\u786e\u5904\u7406WriteValue\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "BlueZ\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Bluez Bluez 5.61"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-43400",
  "serverity": "\u4e2d",
  "submitTime": "2021-11-08",
  "title": "BlueZ\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2021-43400 (GCVE-0-2021-43400)

Vulnerability from cvelistv5 – Published: 2021-11-04 00:00 – Updated: 2025-11-04 16:09

Summary

An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client disconnects during D-Bus processing of a WriteValue call.

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2316 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/pub/scm/bluetooth/bluez.gi…
https://lists.debian.org/debian-lts-announce/2022…	mailing-list
https://lists.debian.org/debian-lts-announce/2024…

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T16:09:24.717Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8"
          },
          {
            "name": "[debian-lts-announce] 20221024 [SECURITY] [DLA 3157-1] bluez security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2024/09/msg00022.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client disconnects during D-Bus processing of a WriteValue call."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-24T00:00:00.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8"
        },
        {
          "name": "[debian-lts-announce] 20221024 [SECURITY] [DLA 3157-1] bluez security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-43400",
    "datePublished": "2021-11-04T00:00:00.000Z",
    "dateReserved": "2021-11-04T00:00:00.000Z",
    "dateUpdated": "2025-11-04T16:09:24.717Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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