cnvd-2015-07700
Vulnerability from cnvd

Title: Linux kernel本地权限提升漏洞（CNVD-2015-07700）

Description:

Linux kernel是美国Linux基金会发布的操作系统Linux所使用的内核。

Linux kernel 4.2.3及之前版本的fs/dcache.c文件中的‘prepend_path’函数存在安全漏洞。由于程序未能正确处理绑定挂载中的重命名操作。本地攻击者可通过重命名目录利用该漏洞绕过既定的容器保护机制。

Severity: 高

Patch Name: Linux kernel本地权限提升漏洞（CNVD-2015-07700）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。

Linux kernel 4.2.3及之前版本的fs/dcache.c文件中的‘prepend_path’函数存在安全漏洞。由于程序未能正确处理绑定挂载中的重命名操作。本地攻击者可通过重命名目录利用该漏洞绕过既定的容器保护机制。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公告获取补丁以修复该漏洞： http://permalink.gmane.org/gmane.linux.kernel.containers/29177

Reference: http://permalink.gmane.org/gmane.linux.kernel.containers/29177 http://www.securityfocus.com/bid/73926

Impacted products
Name
Linux Kernel <=4.2.3
Show details on source website

To clipboard 

{
  "bids": {
    "bid": {
      "bidNumber": "73926"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2015-2925"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel 4.2.3\u53ca\u4e4b\u524d\u7248\u672c\u7684fs/dcache.c\u6587\u4ef6\u4e2d\u7684\u2018prepend_path\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u7531\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u5904\u7406\u7ed1\u5b9a\u6302\u8f7d\u4e2d\u7684\u91cd\u547d\u540d\u64cd\u4f5c\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u91cd\u547d\u540d\u76ee\u5f55\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u65e2\u5b9a\u7684\u5bb9\u5668\u4fdd\u62a4\u673a\u5236\u3002",
  "discovererName": "Josh Boyer",
  "formalWay": "\u7528\u6237\u53ef\u53c2\u8003\u5982\u4e0b\u5382\u5546\u63d0\u4f9b\u7684\u5b89\u5168\u516c\u544a\u83b7\u53d6\u8865\u4e01\u4ee5\u4fee\u590d\u8be5\u6f0f\u6d1e\uff1a\r\nhttp://permalink.gmane.org/gmane.linux.kernel.containers/29177",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2015-07700",
  "openTime": "2015-11-23",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002 \r\n\r\nLinux kernel 4.2.3\u53ca\u4e4b\u524d\u7248\u672c\u7684fs/dcache.c\u6587\u4ef6\u4e2d\u7684\u2018prepend_path\u2019\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u7531\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u5904\u7406\u7ed1\u5b9a\u6302\u8f7d\u4e2d\u7684\u91cd\u547d\u540d\u64cd\u4f5c\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u91cd\u547d\u540d\u76ee\u5f55\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u65e2\u5b9a\u7684\u5bb9\u5668\u4fdd\u62a4\u673a\u5236\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\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff08CNVD-2015-07700\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel \u003c=4.2.3"
  },
  "referenceLink": "http://permalink.gmane.org/gmane.linux.kernel.containers/29177\r\nhttp://www.securityfocus.com/bid/73926",
  "serverity": "\u9ad8",
  "submitTime": "2015-11-19",
  "title": "Linux kernel\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff08CNVD-2015-07700\uff09"
}


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