Each line is corrupted by a prefix string and wrapped inside single quotes. Also consider that lines are actually parsed as
readelf options thus some file contents may lead to unexpected results.
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 readelf -a @$LFILE
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 (<= Stretch) that allow the default
sh shell to run with SUID privileges.
sudo sh -c 'cp $(which readelf) .; chmod +s ./readelf' LFILE=file_to_read ./readelf -a @$LFILE
It runs in privileged context and may be used to access the file system, escalate or maintain access with elevated privileges if enabled on
LFILE=file_to_read sudo readelf -a @$LFILE