/usr/share/zoneinfo/posix/Africa/Khartoum is in tzdata 2012b-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/zoneinfo/posix/Africa/../../Africa/Khartoum
/usr/share/zoneinfo/posix/Africa/../../Africa/Khartoum