cnvd-2021-39771
Vulnerability from cnvd
Title
QEMU msix_table_mmio_write()缓冲区溢出漏洞
Description
QEMU是一套模拟处理器软件。 QEMU msix_table_mmio_write()存在缓冲区溢出漏洞。攻击者可利用漏洞使主机上的QEMU进程崩溃，从而导致拒绝服务。
Severity
低
Patch Name
QEMU msix_table_mmio_write()缓冲区溢出漏洞的补丁
Patch Description
QEMU是一套模拟处理器软件。 QEMU msix_table_mmio_write()存在缓冲区溢出漏洞。攻击者可利用漏洞使主机上的QEMU进程崩溃，从而导致拒绝服务。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

用户可参考如下厂商提供的安全补丁以修复该漏洞： https://bugzilla.redhat.com/show_bug.cgi?id=1902651

Reference
https://bugzilla.redhat.com/show_bug.cgi?id=1902651
Impacted products
Name
Qemu QEMU <5.2.0
Show details on source website

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-27821",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-27821"
    }
  },
  "description": "QEMU\u662f\u4e00\u5957\u6a21\u62df\u5904\u7406\u5668\u8f6f\u4ef6\u3002\n\nQEMU msix_table_mmio_write()\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u4f7f\u4e3b\u673a\u4e0a\u7684QEMU\u8fdb\u7a0b\u5d29\u6e83\uff0c\u4ece\u800c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u7528\u6237\u53ef\u53c2\u8003\u5982\u4e0b\u5382\u5546\u63d0\u4f9b\u7684\u5b89\u5168\u8865\u4e01\u4ee5\u4fee\u590d\u8be5\u6f0f\u6d1e\uff1a\r\nhttps://bugzilla.redhat.com/show_bug.cgi?id=1902651",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-39771",
  "openTime": "2021-06-06",
  "patchDescription": "QEMU\u662f\u4e00\u5957\u6a21\u62df\u5904\u7406\u5668\u8f6f\u4ef6\u3002\r\n\r\nQEMU msix_table_mmio_write()\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u4f7f\u4e3b\u673a\u4e0a\u7684QEMU\u8fdb\u7a0b\u5d29\u6e83\uff0c\u4ece\u800c\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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 msix_table_mmio_write()\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Qemu QEMU \u003c5.2.0"
  },
  "referenceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=1902651",
  "serverity": "\u4f4e",
  "submitTime": "2020-12-07",
  "title": "QEMU msix_table_mmio_write()\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}


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