cnvd-2016-02786
Vulnerability from cnvd
Title
Linux kernel权限获取漏洞（CNVD-2016-02786）
Description
Linux kernel是美国Linux基金会发布的操作系统Linux所使用的内核。aufs是其中的一个联合文件系统模块。 Linux kernel 3.x版本和4.x版本的aufs模块中存在权限获取漏洞，该漏洞源于程序未能正确保持POSIX ACL xattr数据。本地攻击者可借助group-writable setgid目录利用该漏洞获取权限。
Severity
中
Patch Name
Linux kernel权限获取漏洞（CNVD-2016-02786）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。aufs是其中的一个联合文件系统模块。 Linux kernel 3.x版本和4.x版本的aufs模块中存在权限获取漏洞，该漏洞源于程序未能正确保持POSIX ACL xattr数据。本地攻击者可借助group-writable setgid目录利用该漏洞获取权限。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

目前厂商已经发布了升级补丁以修复此安全问题，补丁获取链接： https://sourceforge.net/p/aufs/mailman/message/34864744/

Reference
http://www.openwall.com/lists/oss-security/2016/02/24/9
Impacted products
Name
['Linux Kernel 3.x', 'Linux Kernel 4.x']
Show details on source website

To clipboard 

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2016-2854"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002aufs\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u8054\u5408\u6587\u4ef6\u7cfb\u7edf\u6a21\u5757\u3002\r\n\r\nLinux kernel 3.x\u7248\u672c\u548c4.x\u7248\u672c\u7684aufs\u6a21\u5757\u4e2d\u5b58\u5728\u6743\u9650\u83b7\u53d6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u4fdd\u6301POSIX ACL xattr\u6570\u636e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u501f\u52a9group-writable setgid\u76ee\u5f55\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u6743\u9650\u3002",
  "discovererName": "Linux",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://sourceforge.net/p/aufs/mailman/message/34864744/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-02786",
  "openTime": "2016-05-06",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002aufs\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u8054\u5408\u6587\u4ef6\u7cfb\u7edf\u6a21\u5757\u3002\r\n\r\nLinux kernel 3.x\u7248\u672c\u548c4.x\u7248\u672c\u7684aufs\u6a21\u5757\u4e2d\u5b58\u5728\u6743\u9650\u83b7\u53d6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u4fdd\u6301POSIX ACL xattr\u6570\u636e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u501f\u52a9group-writable setgid\u76ee\u5f55\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\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\u6743\u9650\u83b7\u53d6\u6f0f\u6d1e\uff08CNVD-2016-02786\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Linux Kernel 3.x",
      "Linux Kernel 4.x"
    ]
  },
  "referenceLink": "http://www.openwall.com/lists/oss-security/2016/02/24/9",
  "serverity": "\u4e2d",
  "submitTime": "2016-05-03",
  "title": "Linux kernel\u6743\u9650\u83b7\u53d6\u6f0f\u6d1e\uff08CNVD-2016-02786\uff09"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.