cnvd - cnvd-2017-26787

cnvd-2017-26787

Vulnerability from cnvd

Title: Libexpat Expat on WindowsDLL本地远程执行代码漏洞

Description:

Expat on Windows是美国软件开发者吉姆-克拉克所研发的一个运行在Windows中使用C语言编写的XML解析器库。

基于Windows平台的Expat 2.2.1版本和2.2.2版本中的libexpat的xmlparse.c文件的'writeRandomBytes_RtlGenRandom'函数存在安全漏洞。本地攻击者可借助当前工作路径下的恶意ADVAPI32.DLL利用该漏洞获取权限。

Severity: 中

Patch Name: Libexpat Expat on WindowsDLL本地远程执行代码漏洞的补丁

Patch Description:

Expat on Windows是美国软件开发者吉姆-克拉克所研发的一个运行在Windows中使用C语言编写的XML解析器库。

基于Windows平台的Expat 2.2.1版本和2.2.2版本中的libexpat的xmlparse.c文件的'writeRandomBytes_RtlGenRandom'函数存在安全漏洞。本地攻击者可借助当前工作路径下的恶意ADVAPI32.DLL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:

用户可联系供应商获得补丁信息： https://libexpat.github.io/

Reference: https://github.com/libexpat/libexpat/issues/82

Impacted products

Name
['Libexpat Expat 2.2.2', 'Libexpat Expat 2.2.1']

Show details on source website

JSON

To clipboard

{
  "bids": {
    "bid": {
      "bidNumber": "100147"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-11742"
    }
  },
  "description": "Expat on Windows\u662f\u7f8e\u56fd\u8f6f\u4ef6\u5f00\u53d1\u8005\u5409\u59c6-\u514b\u62c9\u514b\u6240\u7814\u53d1\u7684\u4e00\u4e2a\u8fd0\u884c\u5728Windows\u4e2d\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684XML\u89e3\u6790\u5668\u5e93\u3002\r\n\r\n\u57fa\u4e8eWindows\u5e73\u53f0\u7684Expat 2.2.1\u7248\u672c\u548c2.2.2\u7248\u672c\u4e2d\u7684libexpat\u7684xmlparse.c\u6587\u4ef6\u7684\u0027writeRandomBytes_RtlGenRandom\u0027\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u501f\u52a9\u5f53\u524d\u5de5\u4f5c\u8def\u5f84\u4e0b\u7684\u6076\u610fADVAPI32.DLL\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u6743\u9650\u3002",
  "discovererName": "Sebastian",
  "formalWay": "\u7528\u6237\u53ef\u8054\u7cfb\u4f9b\u5e94\u5546\u83b7\u5f97\u8865\u4e01\u4fe1\u606f\uff1a\r\nhttps://libexpat.github.io/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2017-26787",
  "openTime": "2017-09-15",
  "patchDescription": "Expat on Windows\u662f\u7f8e\u56fd\u8f6f\u4ef6\u5f00\u53d1\u8005\u5409\u59c6-\u514b\u62c9\u514b\u6240\u7814\u53d1\u7684\u4e00\u4e2a\u8fd0\u884c\u5728Windows\u4e2d\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684XML\u89e3\u6790\u5668\u5e93\u3002\r\n\r\n\u57fa\u4e8eWindows\u5e73\u53f0\u7684Expat 2.2.1\u7248\u672c\u548c2.2.2\u7248\u672c\u4e2d\u7684libexpat\u7684xmlparse.c\u6587\u4ef6\u7684\u0027writeRandomBytes_RtlGenRandom\u0027\u51fd\u6570\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u501f\u52a9\u5f53\u524d\u5de5\u4f5c\u8def\u5f84\u4e0b\u7684\u6076\u610fADVAPI32.DLL\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": "Libexpat Expat on WindowsDLL\u672c\u5730\u8fdc\u7a0b\u6267\u884c\u4ee3\u7801\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Libexpat Expat 2.2.2",
      "Libexpat Expat  2.2.1"
    ]
  },
  "referenceLink": "https://github.com/libexpat/libexpat/issues/82",
  "serverity": "\u4e2d",
  "submitTime": "2017-08-02",
  "title": "Libexpat Expat on WindowsDLL\u672c\u5730\u8fdc\u7a0b\u6267\u884c\u4ee3\u7801\u6f0f\u6d1e"
}

CVE-2017-11742 (GCVE-0-2017-11742)

Vulnerability from cvelistv5

Published

2017-07-30 14:00

Modified

2024-08-05 18:19

Severity ?

CWE

Summary

The writeRandomBytes_RtlGenRandom function in xmlparse.c in libexpat in Expat 2.2.1 and 2.2.2 on Windows allows local users to gain privileges via a Trojan horse ADVAPI32.DLL in the current working directory because of an untrusted search path, aka DLL hijacking.

References

▼	URL	Tags
	https://github.com/libexpat/libexpat/issues/82	x_refsource_CONFIRM
	http://www.securityfocus.com/bid/100147	vdb-entry, x_refsource_BID

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

{
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          "dateUpdated": "2024-08-05T18:19:39.237Z",
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            "url": "https://github.com/libexpat/libexpat/issues/82"
          },
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            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/100147"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
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      ],
      "datePublic": "2017-07-30T00:00:00",
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          "lang": "en",
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        }
      ],
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      "providerMetadata": {
        "dateUpdated": "2017-08-08T09:57:01",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/libexpat/libexpat/issues/82"
        },
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          "name": "100147",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/100147"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2017-11742",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
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                "product": {
                  "product_data": [
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                      "product_name": "n/a",
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                        "version_data": [
                          {
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                      }
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  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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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