Vulnerability-Lookup

CNVD-2016-11670

Vulnerability from cnvd - Published: 2016-11-30

Title

Linux kernel权限提升漏洞（CNVD-2016-11670）

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 4.4.22至4.4.28版本中的arch/x86/include/asm/uaccess.h文件中的__get_user_asm_ex宏存在安全漏洞。本地攻击者可借助特制的应用程序利用该漏洞获取non-SMEP平台上的root权限。

Severity

高

Patch Name

Linux kernel权限提升漏洞（CNVD-2016-11670）的补丁

Patch Description

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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1c109fabbd51863475cd12ac206bdd249aee35af

Reference

http://www.securityfocus.com/bid/94545 http://www.openwall.com/lists/oss-security/2016/11/07/4

Impacted products

Name
Linux Kernel >=4.4.22，<=4.4.28

Show details on source website

JSON

To clipboard

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  "bids": {
    "bid": {
      "bidNumber": "94545"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2016-9644"
    }
  },
  "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 4.4.22\u81f34.4.28\u7248\u672c\u4e2d\u7684arch/x86/include/asm/uaccess.h\u6587\u4ef6\u4e2d\u7684__get_user_asm_ex\u5b8f\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684\u5e94\u7528\u7a0b\u5e8f\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6non-SMEP\u5e73\u53f0\u4e0a\u7684root\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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1c109fabbd51863475cd12ac206bdd249aee35af",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-11670",
  "openTime": "2016-11-30",
  "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 4.4.22\u81f34.4.28\u7248\u672c\u4e2d\u7684arch/x86/include/asm/uaccess.h\u6587\u4ef6\u4e2d\u7684__get_user_asm_ex\u5b8f\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u501f\u52a9\u7279\u5236\u7684\u5e94\u7528\u7a0b\u5e8f\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6non-SMEP\u5e73\u53f0\u4e0a\u7684root\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\u63d0\u5347\u6f0f\u6d1e\uff08CNVD-2016-11670\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel \u003e=4.4.22\uff0c\u003c=4.4.28"
  },
  "referenceLink": "http://www.securityfocus.com/bid/94545\r\nhttp://www.openwall.com/lists/oss-security/2016/11/07/4",
  "serverity": "\u9ad8",
  "submitTime": "2016-11-29",
  "title": "Linux kernel\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff08CNVD-2016-11670\uff09"
}

CVE-2016-9644 (GCVE-0-2016-9644)

Vulnerability from cvelistv5 – Published: 2016-11-28 03:01 – Updated: 2024-08-06 02:59

Summary

The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application. NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

5 references

URL	Tags
http://www.ubuntu.com/usn/USN-3146-2	vendor-advisoryx_refsource_UBUNTU
http://www.securityfocus.com/bid/94545	vdb-entryx_refsource_BID
http://www.ubuntu.com/usn/USN-3146-1	vendor-advisoryx_refsource_UBUNTU
http://www.openwall.com/lists/oss-security/2016/11/07/4	mailing-listx_refsource_MLIST
https://lwn.net/Articles/705220/	x_refsource_CONFIRM

Date Public

2016-11-01 00:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Action not permitted

CNVD-2016-11670

CVE-2016-9644 (GCVE-0-2016-9644)

Tags

Sightings

Nomenclature

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