Vulnerability-Lookup

CNVD-2021-92546

Vulnerability from cnvd - Published: 2021-11-30

Title

BlueZ资源管理错误漏洞（CNVD-2021-92546）

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存在资源管理错误漏洞，该漏洞源于在受影响的版本中，sdp的cstate alloc buf中存在一个漏洞，它分配的内存总是挂起在cstate单链表中并且不会被释放，随着时间的推移这将导致内存泄漏。攻击者可利用该漏洞不断发送sdp包造成的，最终可能导致目标设备的服务崩溃。

Severity

低

Patch Name

BlueZ资源管理错误漏洞（CNVD-2021-92546）的补丁

Patch Description

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://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-41229

Impacted products

Name
Bluez Bluez 5.58

Show details on source website

JSON

To clipboard

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-41229"
    }
  },
  "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\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u53d7\u5f71\u54cd\u7684\u7248\u672c\u4e2d\uff0csdp\u7684cstate alloc buf\u4e2d\u5b58\u5728\u4e00\u4e2a\u6f0f\u6d1e\uff0c\u5b83\u5206\u914d\u7684\u5185\u5b58\u603b\u662f\u6302\u8d77\u5728cstate\u5355\u94fe\u8868\u4e2d\u5e76\u4e14\u4e0d\u4f1a\u88ab\u91ca\u653e\uff0c\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\u8fd9\u5c06\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u4e0d\u65ad\u53d1\u9001sdp\u5305\u9020\u6210\u7684\uff0c\u6700\u7ec8\u53ef\u80fd\u5bfc\u81f4\u76ee\u6807\u8bbe\u5907\u7684\u670d\u52a1\u5d29\u6e83\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://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-92546",
  "openTime": "2021-11-30",
  "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\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u53d7\u5f71\u54cd\u7684\u7248\u672c\u4e2d\uff0csdp\u7684cstate alloc buf\u4e2d\u5b58\u5728\u4e00\u4e2a\u6f0f\u6d1e\uff0c\u5b83\u5206\u914d\u7684\u5185\u5b58\u603b\u662f\u6302\u8d77\u5728cstate\u5355\u94fe\u8868\u4e2d\u5e76\u4e14\u4e0d\u4f1a\u88ab\u91ca\u653e\uff0c\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\u8fd9\u5c06\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u4e0d\u65ad\u53d1\u9001sdp\u5305\u9020\u6210\u7684\uff0c\u6700\u7ec8\u53ef\u80fd\u5bfc\u81f4\u76ee\u6807\u8bbe\u5907\u7684\u670d\u52a1\u5d29\u6e83\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\uff08CNVD-2021-92546\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Bluez Bluez 5.58"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-41229",
  "serverity": "\u4f4e",
  "submitTime": "2021-11-16",
  "title": "BlueZ\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-92546\uff09"
}

CVE-2021-41229 (GCVE-0-2021-41229)

Vulnerability from cvelistv5 – Published: 2021-11-12 00:00 – Updated: 2025-11-04 16:09

Title

Memory leak in BlueZ

Summary

BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7637 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/bluez/bluez/security/advisorie…
https://lists.debian.org/debian-lts-announce/2021…	mailing-list
https://security.netapp.com/advisory/ntap-2021120…
https://lists.debian.org/debian-lts-announce/2022…	mailing-list
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

1 product

Vendor	Product	Version
bluez	bluez	Affected: = 5.58

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T16:09:18.907Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq"
          },
          {
            "name": "[debian-lts-announce] 20211127 [SECURITY] [DLA 2827-1] bluez security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00022.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20211203-0004/"
          },
          {
            "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": "bluez",
          "vendor": "bluez",
          "versions": [
            {
              "status": "affected",
              "version": "= 5.58"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-24T00:00:00.000Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "url": "https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq"
        },
        {
          "name": "[debian-lts-announce] 20211127 [SECURITY] [DLA 2827-1] bluez security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00022.html"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20211203-0004/"
        },
        {
          "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"
        }
      ],
      "source": {
        "advisory": "GHSA-3fqg-r8j5-f5xq",
        "discovery": "UNKNOWN"
      },
      "title": "Memory leak in BlueZ"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2021-41229",
    "datePublished": "2021-11-12T00:00:00.000Z",
    "dateReserved": "2021-09-15T00:00:00.000Z",
    "dateUpdated": "2025-11-04T16:09:18.907Z",
    "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

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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.
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