cnvd - cnvd-2021-14790

cnvd-2021-14790

Vulnerability from cnvd

Title: QEMU资源管理错误漏洞（CNVD-2021-14790）

Description:

QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。

qemu 5.2.0-2存在资源管理错误漏洞，攻击者可使用此漏洞使主机上的QEMU进程崩溃，从而导致拒绝服务的情况。

Severity: 低

Patch Name: QEMU资源管理错误漏洞（CNVD-2021-14790）的补丁

Patch Description:

QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。

qemu 5.2.0-2存在资源管理错误漏洞，攻击者可使用此漏洞使主机上的QEMU进程崩溃，从而导致拒绝服务的情况。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:

厂商已发布了漏洞修复程序，请及时关注更新： https://sourceware.org/bugzilla/show_bug.cgi?id=27462

Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-27645

Impacted products

Name
QEMU QEMU 5.2.0-2

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-27645",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-27645"
    }
  },
  "description": "QEMU\uff08Quick Emulator\uff09\u662f\u6cd5\u56fd\u6cd5\u5e03\u91cc\u65af-\u8d1d\u62c9\uff08Fabrice Bellard\uff09\u4e2a\u4eba\u5f00\u53d1\u8005\u7684\u4e00\u5957\u6a21\u62df\u5904\u7406\u5668\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u5177\u6709\u901f\u5ea6\u5feb\u3001\u8de8\u5e73\u53f0\u7b49\u7279\u70b9\u3002\n\nqemu 5.2.0-2\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u4f7f\u7528\u6b64\u6f0f\u6d1e\u4f7f\u4e3b\u673a\u4e0a\u7684QEMU\u8fdb\u7a0b\u5d29\u6e83\uff0c\u4ece\u800c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u7684\u60c5\u51b5\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://sourceware.org/bugzilla/show_bug.cgi?id=27462",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-14790",
  "openTime": "2021-03-07",
  "patchDescription": "QEMU\uff08Quick Emulator\uff09\u662f\u6cd5\u56fd\u6cd5\u5e03\u91cc\u65af-\u8d1d\u62c9\uff08Fabrice Bellard\uff09\u4e2a\u4eba\u5f00\u53d1\u8005\u7684\u4e00\u5957\u6a21\u62df\u5904\u7406\u5668\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u5177\u6709\u901f\u5ea6\u5feb\u3001\u8de8\u5e73\u53f0\u7b49\u7279\u70b9\u3002\r\n\r\nqemu 5.2.0-2\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u4f7f\u7528\u6b64\u6f0f\u6d1e\u4f7f\u4e3b\u673a\u4e0a\u7684QEMU\u8fdb\u7a0b\u5d29\u6e83\uff0c\u4ece\u800c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u7684\u60c5\u51b5\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": "QEMU\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-14790\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "QEMU QEMU 5.2.0-2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-27645",
  "serverity": "\u4f4e",
  "submitTime": "2021-02-26",
  "title": "QEMU\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-14790\uff09"
}

CVE-2021-27645 (GCVE-0-2021-27645)

Vulnerability from cvelistv5

Published

2021-02-24 00:00

Modified

2025-06-09 14:58

Severity ?

2.5 (Low) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE

Summary

The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.

References

▼	URL	Tags
	https://sourceware.org/bugzilla/show_bug.cgi?id=27462
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/	vendor-advisory
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/	vendor-advisory
	https://security.gentoo.org/glsa/202107-07	vendor-advisory
	https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html	mailing-list

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T21:26:10.554Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "tags": [
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            ],
            "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=27462"
          },
          {
            "name": "FEDORA-2021-6749bfcfd9",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/"
          },
          {
            "name": "FEDORA-2021-2ba993d6c5",
            "tags": [
              "vendor-advisory",
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/"
          },
          {
            "name": "GLSA-202107-07",
            "tags": [
              "vendor-advisory",
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            "url": "https://security.gentoo.org/glsa/202107-07"
          },
          {
            "name": "[debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "LOW",
              "baseScore": 2.5,
              "baseSeverity": "LOW",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-27645",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-09T14:57:29.856656Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-415",
                "description": "CWE-415 Double Free",
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-09T14:58:23.319Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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    "cna": {
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      "descriptions": [
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          "value": "The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c."
        }
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      "problemTypes": [
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          "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=27462"
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          "tags": [
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          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/"
        },
        {
          "name": "FEDORA-2021-2ba993d6c5",
          "tags": [
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          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/"
        },
        {
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          "url": "https://security.gentoo.org/glsa/202107-07"
        },
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          "name": "[debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security update",
          "tags": [
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  "cveMetadata": {
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    "assignerShortName": "mitre",
    "cveId": "CVE-2021-27645",
    "datePublished": "2021-02-24T00:00:00.000Z",
    "dateReserved": "2021-02-24T00:00:00.000Z",
    "dateUpdated": "2025-06-09T14:58:23.319Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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