用友NC /fs/update/DownloadServlet 接口存在反序列化漏洞

Description

PoC

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References

• https://github.com/bmth666/Yongyou-Unserialize-plus
• https://cn-sec.com/archives/2108907.html
• https://www.cnblogs.com/pursue-security/p/archive/2023/10/28
• https://disk.scan.cm/zlsec/zlsec_info/document/wiki/_book/PeiQi_Wiki/OA%E4%BA%A7%E5%93%81%E6%BC%8F%E6%B4%9E/%E7%94%A8%E5%8F%8BOA/%E7%94%A8%E5%8F%8B%20NC%20%E5%8F%8D%E5%BA%8F%E5%88%97%E5%8C%96RCE%E6%BC%8F%E6%B4%9E.md
• https://github.com/Threekiii/Vulnerability-Wiki/blob/master/docs-base/docs/oa/%E7%94%A8%E5%8F%8B-NC-FileReceiveServlet-%E5%8F%8D%E5%BA%8F%E5%88%97%E5%8C%96RCE%E6%BC%8F%E6%B4%9E.md
• https://cn-sec.com/archives/3892894.html

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