CNVD-2018-24550

Vulnerability from cnvd - Published: 2018-12-04
VLAI
Title
Linux kernel KVM virtualization子系统权限提升漏洞
Description
Linux kernel是美国Linux基金会发布的操作系统Linux所使用的内核。KVM virtualization subsystem是其中的一个KVM（Kernel-based Virtual Machine，基于内核的虚拟机）虚拟化子系统。 Linux kernel中的KVM virtualization子系统存在安全漏洞，该漏洞源于VMX代码没有将GDT.LIMIT恢复到之前主机的值，而是设置成64KB。攻击者可借助恶意的条目利用该漏洞提升权限。
Severity
高
Patch Name
Linux kernel KVM virtualization子系统权限提升漏洞的补丁
Patch Description
Linux kernel是美国Linux基金会发布的操作系统Linux所使用的内核。KVM virtualization subsystem是其中的一个KVM（Kernel-based Virtual Machine，基于内核的虚拟机）虚拟化子系统。 Linux kernel中的KVM virtualization子系统存在安全漏洞，该漏洞源于VMX代码没有将GDT.LIMIT恢复到之前主机的值，而是设置成64KB。攻击者可借助恶意的条目利用该漏洞提升权限。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/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36

Reference
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36 http://www.securityfocus.com/bid/104905
Impacted products
Name
Linux Kernel
Show details on source website
To clipboard 

{
  "bids": {
    "bid": {
      "bidNumber": "104905"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-10901",
      "cveUrl": "http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10901"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002KVM virtualization subsystem\u662f\u5176\u4e2d\u7684\u4e00\u4e2aKVM\uff08Kernel-based Virtual Machine\uff0c\u57fa\u4e8e\u5185\u6838\u7684\u865a\u62df\u673a\uff09\u865a\u62df\u5316\u5b50\u7cfb\u7edf\u3002\n\nLinux kernel\u4e2d\u7684KVM virtualization\u5b50\u7cfb\u7edf\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eVMX\u4ee3\u7801\u6ca1\u6709\u5c06GDT.LIMIT\u6062\u590d\u5230\u4e4b\u524d\u4e3b\u673a\u7684\u503c\uff0c\u800c\u662f\u8bbe\u7f6e\u621064KB\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9\u6076\u610f\u7684\u6761\u76ee\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u5347\u6743\u9650\u3002",
  "discovererName": "Vegard Nossum",
  "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/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-24550",
  "openTime": "2018-12-04",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002KVM virtualization subsystem\u662f\u5176\u4e2d\u7684\u4e00\u4e2aKVM\uff08Kernel-based Virtual Machine\uff0c\u57fa\u4e8e\u5185\u6838\u7684\u865a\u62df\u673a\uff09\u865a\u62df\u5316\u5b50\u7cfb\u7edf\u3002\r\n\r\nLinux kernel\u4e2d\u7684KVM virtualization\u5b50\u7cfb\u7edf\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eVMX\u4ee3\u7801\u6ca1\u6709\u5c06GDT.LIMIT\u6062\u590d\u5230\u4e4b\u524d\u4e3b\u673a\u7684\u503c\uff0c\u800c\u662f\u8bbe\u7f6e\u621064KB\u3002\u653b\u51fb\u8005\u53ef\u501f\u52a9\u6076\u610f\u7684\u6761\u76ee\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u5347\u6743\u9650\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": "Linux kernel KVM virtualization\u5b50\u7cfb\u7edf\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel"
  },
  "referenceLink": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36\r\nhttp://www.securityfocus.com/bid/104905",
  "serverity": "\u9ad8",
  "submitTime": "2018-07-31",
  "title": "Linux kernel KVM virtualization\u5b50\u7cfb\u7edf\u6743\u9650\u63d0\u5347\u6f0f\u6d1e"
}



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Sightings

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Nomenclature

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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
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