cnvd-2018-05305
Vulnerability from cnvd
Title
Linux kernel竞争条件漏洞（CNVD-2018-05305）
Description
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel中的arch/x86/kernel/cpu/mcheck/mce.c文件的‘store_int_with_restart()’函数存在竞争条件漏洞。本地攻击者可通过向/sys/devices/system/machinecheck/machinecheck目录下的check_interval文件写入值利用该漏洞造成拒绝服务（内核错误和内核挂起）。
Severity
低
Patch Name
Linux kernel竞争条件漏洞（CNVD-2018-05305）的补丁
Patch Description
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel中的arch/x86/kernel/cpu/mcheck/mce.c文件的‘store_int_with_restart()’函数存在竞争条件漏洞。本地攻击者可通过向/sys/devices/system/machinecheck/machinecheck目录下的check_interval文件写入值利用该漏洞造成拒绝服务（内核错误和内核挂起）。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/tip/tip.git/commit/?id=b3b7c4795ccab5be71f080774c45bbbcc75c2aaf

Reference
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b3b7c4795ccab5be71f080774c45bbbcc75c2aaf https://lkml.org/lkml/2018/3/2/970
Impacted products
Name
Linux kernel <=4.15.7
Show details on source website

To clipboard 

{
  "bids": {
    "bid": {
      "bidNumber": "103356"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-7995"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u4e2d\u7684arch/x86/kernel/cpu/mcheck/mce.c\u6587\u4ef6\u7684\u2018store_int_with_restart()\u2019\u51fd\u6570\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5411/sys/devices/system/machinecheck/machinecheck\u76ee\u5f55\u4e0b\u7684check_interval\u6587\u4ef6\u5199\u5165\u503c\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u5185\u6838\u9519\u8bef\u548c\u5185\u6838\u6302\u8d77\uff09\u3002",
  "discovererName": "Seunghun Han",
  "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/tip/tip.git/commit/?id=b3b7c4795ccab5be71f080774c45bbbcc75c2aaf",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-05305",
  "openTime": "2018-03-15",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u4e2d\u7684arch/x86/kernel/cpu/mcheck/mce.c\u6587\u4ef6\u7684\u2018store_int_with_restart()\u2019\u51fd\u6570\u5b58\u5728\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5411/sys/devices/system/machinecheck/machinecheck\u76ee\u5f55\u4e0b\u7684check_interval\u6587\u4ef6\u5199\u5165\u503c\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u5185\u6838\u9519\u8bef\u548c\u5185\u6838\u6302\u8d77\uff09\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\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\uff08CNVD-2018-05305\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux kernel \u003c=4.15.7"
  },
  "referenceLink": "https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=b3b7c4795ccab5be71f080774c45bbbcc75c2aaf\r\nhttps://lkml.org/lkml/2018/3/2/970",
  "serverity": "\u4f4e",
  "submitTime": "2018-03-14",
  "title": "Linux kernel\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\uff08CNVD-2018-05305\uff09"
}


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