Vulnerability-Lookup

CNVD-2017-26787

Vulnerability from cnvd - Published: 2017-09-15

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

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

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    "bid": {
      "bidNumber": "100147"
    }
  },
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    "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 – Updated: 2024-08-05 18:19

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.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://github.com/libexpat/libexpat/issues/82	x_refsource_CONFIRM
http://www.securityfocus.com/bid/100147	vdb-entryx_refsource_BID

Date Public

2017-07-30 00:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.