cnvd - cnvd-2018-00646

cnvd-2018-00646

Vulnerability from cnvd

Title: GNU C Library权限提升漏洞

Description:

GNU C Library是一种按照LGPL许可协议发布的、开源、免费、方便从网络下载的C的编译程序。

GNU C Library存在权限提升漏洞。该漏洞产生的原因是GNU C Library中的elf/dl-load.c未能正确处理特权（setuid或AT_SECURE）程序的包含$ORIGIN的RPATH和RUNPATH。攻击者可通过当前工作目录中的特洛伊木马程序库利用该漏洞获得特权。

Severity: 高

Patch Name: GNU C Library权限提升漏洞的补丁

Patch Description:

GNU C Library是一种按照LGPL许可协议发布的、开源、免费、方便从网络下载的C的编译程序。

GNU C Library存在权限提升漏洞。该漏洞产生的原因是GNU C Library中的elf/dl-load.c未能正确处理特权（setuid或AT_SECURE）程序的包含$ORIGIN的RPATH和RUNPATH。攻击者可通过当前工作目录中的特洛伊木马程序库利用该漏洞获得特权。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://sourceware.org/ml/libc-alpha/2017-12/msg00528.html

Reference: https://nvd.nist.gov/vuln/detail/CVE-2017-16997

Impacted products

Name
GNU C Library >=2.19，<=2.26

Show details on source website

JSON

To clipboard

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    "bid": {
      "bidNumber": "102228"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-16997"
    }
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  "description": "GNU C Library\u662f\u4e00\u79cd\u6309\u7167LGPL\u8bb8\u53ef\u534f\u8bae\u53d1\u5e03\u7684\u3001\u5f00\u6e90\u3001\u514d\u8d39\u3001\u65b9\u4fbf\u4ece\u7f51\u7edc\u4e0b\u8f7d\u7684C\u7684\u7f16\u8bd1\u7a0b\u5e8f\u3002\r\n\r\nGNU C Library\u5b58\u5728\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fGNU C Library\u4e2d\u7684elf/dl-load.c\u672a\u80fd\u6b63\u786e\u5904\u7406\u7279\u6743\uff08setuid\u6216AT_SECURE\uff09\u7a0b\u5e8f\u7684\u5305\u542b$ORIGIN\u7684RPATH\u548cRUNPATH\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\u4e2d\u7684\u7279\u6d1b\u4f0a\u6728\u9a6c\u7a0b\u5e8f\u5e93\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u5f97\u7279\u6743\u3002",
  "discovererName": "Aurelien Jarno",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://sourceware.org/ml/libc-alpha/2017-12/msg00528.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-00646",
  "openTime": "2018-01-10",
  "patchDescription": "GNU C Library\u662f\u4e00\u79cd\u6309\u7167LGPL\u8bb8\u53ef\u534f\u8bae\u53d1\u5e03\u7684\u3001\u5f00\u6e90\u3001\u514d\u8d39\u3001\u65b9\u4fbf\u4ece\u7f51\u7edc\u4e0b\u8f7d\u7684C\u7684\u7f16\u8bd1\u7a0b\u5e8f\u3002\r\n\r\nGNU C Library\u5b58\u5728\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fGNU C Library\u4e2d\u7684elf/dl-load.c\u672a\u80fd\u6b63\u786e\u5904\u7406\u7279\u6743\uff08setuid\u6216AT_SECURE\uff09\u7a0b\u5e8f\u7684\u5305\u542b$ORIGIN\u7684RPATH\u548cRUNPATH\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\u4e2d\u7684\u7279\u6d1b\u4f0a\u6728\u9a6c\u7a0b\u5e8f\u5e93\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u5f97\u7279\u6743\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": "GNU C Library\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "GNU C Library \u003e=2.19\uff0c\u003c=2.26"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2017-16997",
  "serverity": "\u9ad8",
  "submitTime": "2017-12-18",
  "title": "GNU C Library\u6743\u9650\u63d0\u5347\u6f0f\u6d1e"
}

CVE-2017-16997 (GCVE-0-2017-16997)

Vulnerability from cvelistv5

Published

2017-12-18 01:00

Modified

2024-08-05 20:43

Severity ?

CWE

improper RPATH/RUNPATH validation

Summary

elf/dl-load.c in the GNU C Library (aka glibc or libc6) 2.19 through 2.26 mishandles RPATH and RUNPATH containing $ORIGIN for a privileged (setuid or AT_SECURE) program, which allows local users to gain privileges via a Trojan horse library in the current working directory, related to the fillin_rpath and decompose_rpath functions. This is associated with misinterpretion of an empty RPATH/RUNPATH token as the "./" directory. NOTE: this configuration of RPATH/RUNPATH for a privileged program is apparently very uncommon; most likely, no such program is shipped with any common Linux distribution.

References

▼	URL	Tags
	https://sourceware.org/bugzilla/show_bug.cgi?id=22625	x_refsource_CONFIRM
	http://www.securityfocus.com/bid/102228	vdb-entry, x_refsource_BID
	https://sourceware.org/ml/libc-alpha/2017-12/msg00528.html	x_refsource_CONFIRM
	https://bugs.debian.org/884615	x_refsource_CONFIRM
	https://access.redhat.com/errata/RHSA-2018:3092	vendor-advisory, x_refsource_REDHAT
	https://access.redhat.com/errata/RHBA-2019:0327	vendor-advisory, x_refsource_REDHAT

Impacted products

	Vendor	Product	Version
	n/a	glibc 2.19 through 2.26	Version: glibc 2.19 through 2.26

Show details on NVD website

JSON

To clipboard

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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.
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.

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