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Add symlink option for ssh.set_working_directory to simplify exploits #862

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merged 2 commits into from
Jan 20, 2017
Merged

Add symlink option for ssh.set_working_directory to simplify exploits #862

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6a1fa9f
Add symlink option for ssh.set_working_directory to simplify exploit …
zachriggle Jan 19, 2017
0c1d408
Add additional options and tests to symlink=xxx
zachriggle Jan 20, 2017
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11 changes: 10 additions & 1 deletion pwnlib/tubes/ssh.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1587,7 +1587,7 @@ def interactive(self, shell=None):
s.interactive()
s.close()

def set_working_directory(self, wd = None):
def set_working_directory(self, wd = None, symlink=False):
"""Sets the working directory in which future commands will
be run (via ssh.run) and to which files will be uploaded/downloaded
from if no path is provided
Expand All @@ -1602,6 +1602,8 @@ def set_working_directory(self, wd = None):
Arguments:
wd(string): Working directory. Default is to auto-generate a directory
based on the result of running 'mktemp -d' on the remote machine.
symlink(bool): Whether to symlink all files / directories in the
original directory. Default is ``False``.

Examples:
>>> s = ssh(host='example.pwnme',
Expand All @@ -1615,6 +1617,9 @@ def set_working_directory(self, wd = None):
"""
status = 0

if symlink:
oldwd = self.pwd()

if not wd:
wd, status = self.run_to_end('x=$(mktemp -d) && cd $x && chmod +x . && echo $PWD', wd='.')
wd = wd.strip()
Expand All @@ -1631,6 +1636,10 @@ def set_working_directory(self, wd = None):

self.info("Working directory: %r" % wd)
self.cwd = wd

if symlink:
self.ln('-s', os.path.join(oldwd, '*'), '.')

return self.cwd

def write(self, path, data):
Expand Down