CNVD-2018-00244

Vulnerability from cnvd - Published: 2018-01-04
VLAI
Title
Linux kernel信息泄露漏洞（CNVD-2018-00244）
Description
Linux kernel是一种计算机操作系统内核，以C语言和汇编语言写成，符合POSIX标准，按GNU通用公共许可证发行。 4.14.4及更早版本的Linux kernel存在信息泄露漏洞。该漏洞产生的原因是Linux kernel中的net/netlink/af_netlink.c中的__netlink_deliver_tap_skb函数未将Netlink消息的观察限制为单个net命名空间。本地用户可利用CAP_NET_ADMIN功能来嗅探系统上所有Netlink活动的nlmon接口，从而可获取敏感信息。
Severity
低
Patch Name
Linux kernel信息泄露漏洞（CNVD-2018-00244）的补丁
Patch Description
Linux kernel是一种计算机操作系统内核，以C语言和汇编语言写成，符合POSIX标准，按GNU通用公共许可证发行。 4.14.4及更早版本的Linux kernel存在信息泄露漏洞。该漏洞产生的原因是Linux kernel中的net/netlink/af_netlink.c中的__netlink_deliver_tap_skb函数未将Netlink消息的观察限制为单个net命名空间。本地用户可利用CAP_NET_ADMIN功能来嗅探系统上所有Netlink活动的nlmon接口，从而可获取敏感信息。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

厂商已发布漏洞修复程序，请及时关注更新： https://lkml.org/lkml/2017/12/5/950

Reference
https://nvd.nist.gov/vuln/detail/CVE-2017-17449
Impacted products
Name
Linux kernel <=4.14.4
Show details on source website
To clipboard 

{
  "bids": {
    "bid": {
      "bidNumber": "102122"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-17449"
    }
  },
  "description": "Linux kernel\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u4ee5C\u8bed\u8a00\u548c\u6c47\u7f16\u8bed\u8a00\u5199\u6210\uff0c\u7b26\u5408POSIX\u6807\u51c6\uff0c\u6309GNU\u901a\u7528\u516c\u5171\u8bb8\u53ef\u8bc1\u53d1\u884c\u3002\r\n\r\n4.14.4\u53ca\u66f4\u65e9\u7248\u672c\u7684Linux kernel\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fLinux kernel\u4e2d\u7684net/netlink/af_netlink.c\u4e2d\u7684__netlink_deliver_tap_skb\u51fd\u6570\u672a\u5c06Netlink\u6d88\u606f\u7684\u89c2\u5bdf\u9650\u5236\u4e3a\u5355\u4e2anet\u547d\u540d\u7a7a\u95f4\u3002\u672c\u5730\u7528\u6237\u53ef\u5229\u7528CAP_NET_ADMIN\u529f\u80fd\u6765\u55c5\u63a2\u7cfb\u7edf\u4e0a\u6240\u6709Netlink\u6d3b\u52a8\u7684nlmon\u63a5\u53e3\uff0c\u4ece\u800c\u53ef\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u3002",
  "discovererName": "Kevin Cernekee",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://lkml.org/lkml/2017/12/5/950",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-00244",
  "openTime": "2018-01-04",
  "patchDescription": "Linux kernel\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u4ee5C\u8bed\u8a00\u548c\u6c47\u7f16\u8bed\u8a00\u5199\u6210\uff0c\u7b26\u5408POSIX\u6807\u51c6\uff0c\u6309GNU\u901a\u7528\u516c\u5171\u8bb8\u53ef\u8bc1\u53d1\u884c\u3002\r\n\r\n4.14.4\u53ca\u66f4\u65e9\u7248\u672c\u7684Linux kernel\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fLinux kernel\u4e2d\u7684net/netlink/af_netlink.c\u4e2d\u7684__netlink_deliver_tap_skb\u51fd\u6570\u672a\u5c06Netlink\u6d88\u606f\u7684\u89c2\u5bdf\u9650\u5236\u4e3a\u5355\u4e2anet\u547d\u540d\u7a7a\u95f4\u3002\u672c\u5730\u7528\u6237\u53ef\u5229\u7528CAP_NET_ADMIN\u529f\u80fd\u6765\u55c5\u63a2\u7cfb\u7edf\u4e0a\u6240\u6709Netlink\u6d3b\u52a8\u7684nlmon\u63a5\u53e3\uff0c\u4ece\u800c\u53ef\u83b7\u53d6\u654f\u611f\u4fe1\u606f\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\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2018-00244\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux kernel \u003c=4.14.4"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2017-17449",
  "serverity": "\u4f4e",
  "submitTime": "2017-12-07",
  "title": "Linux kernel\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2018-00244\uff09"
}



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