<?php if( isset( $_GET[ 'Change' ] ) ) { // Checks to see where the request came from if( eregi( $_SERVER[ 'SERVER_NAME' ], $_SERVER[ 'HTTP_REFERER' ] ) ) { // Get input $pass_new = $_GET[ 'password_new' ]; $pass_conf = $_GET[ 'password_conf' ]; // Do the passwords match? if( $pass_new == $pass_conf ) { // They do! $pass_new = mysql_real_escape_string( $pass_new ); $pass_new = md5( $pass_new ); // Update the database $insert = "UPDATE `users` SET password = '$pass_new' WHERE user = '" . dvwaCurrentUser() . "';"; $result = mysql_query( $insert ) or die( '<pre>' . mysql_error() . '</pre>' ); // Feedback for the user $html .= "<pre>Password Changed.</pre>"; } else { // Issue with passwords matching $html .= "<pre>Passwords did not match.</pre>"; } } else { // Didn't come from a trusted source $html .= "<pre>That request didn't look correct.</pre>"; } mysql_close(); } ?>分析存在的漏洞是什么?针对这段代码,需要采取哪些措施来防范该漏洞?
时间: 2024-04-04 15:31:54 浏览: 17
这段代码存在以下漏洞:
1. 使用了被废弃的 eregi 函数,可能会导致正则表达式注入漏洞。
2. 没有对输入进行任何验证或过滤,可能会导致 SQL 注入漏洞。
3. 没有对密码进行任何加密,只是简单地使用了 md5 散列,不足以保障密码的安全性。
为了防范这些漏洞,可以采取以下措施:
1. 使用 preg_match 函数替代 eregi 函数,并使用正则表达式进行输入验证。
2. 使用参数化查询或预处理语句来防止 SQL 注入漏洞。
3. 使用更安全的密码散列算法,如 bcrypt 或 PBKDF2,并添加盐值以增加密码的安全性。
相关问题
mcu_uart_working = gpio_read(GPIO_WAKEUP_MODULE); //mcu use GPIO_WAKEUP_MODULE to indicate the UART data transmission or receiving state module_uart_working = UART_TX_BUSY || UART_RX_BUSY; //module checks to see if UART rx and tX are all processed module_task_busy = mcu_uart_working || module_uart_working; return module_task_busy;
这段代码的作用是检查模块是否正在进行UART数据传输或接收,并且返回一个布尔值来指示模块任务是否繁忙。其中,第一行代码使用GPIO_WAKEUP_MODULE读取MCU对UART数据传输或接收状态的指示,并将其赋值给mcu_uart_working变量。第二行代码检查UART的发送和接收是否正在进行,并将结果赋值给module_uart_working变量。第三行代码将mcu_uart_working和module_uart_working变量进行逻辑或运算,得到模块任务是否繁忙的结果,并将其赋值给module_task_busy变量。最后一行代码返回module_task_busy变量的值。
'a==1&&$1~/'$CHIP_KEY'/{print $2;exit}' what does $1~ mean?
In the given command, `$1~/'$CHIP_KEY'/` is a pattern matching expression in awk. Here, `$1` refers to the first field of the input record and `~` is the pattern matching operator in awk.
So, `$1~/'$CHIP_KEY'/` matches the regular expression `'$CHIP_KEY'` with the first field of the input record. The regular expression `'$CHIP_KEY'` is a shell variable that contains the value of `$CHIP_KEY`.
In other words, the expression `$1~/'$CHIP_KEY'/` checks if the value of the first field of the input record matches the value of the `$CHIP_KEY` variable. If it does, then the command prints the value of the second field of the input record and exits.