/usr/share/perl5/ is in dahdi 1:2.4.1-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Dahdi/
/usr/share/perl5/Dahdi/Chans.pm
/usr/share/perl5/Dahdi/Config/
/usr/share/perl5/Dahdi/Config/Params.pm
/usr/share/perl5/Dahdi/Config/Gen/
/usr/share/perl5/Dahdi/Config/Gen/Chandahdi.pm
/usr/share/perl5/Dahdi/Config/Gen/Xpporder.pm
/usr/share/perl5/Dahdi/Config/Gen/Unicall.pm
/usr/share/perl5/Dahdi/Config/Gen/Users.pm
/usr/share/perl5/Dahdi/Config/Gen/System.pm
/usr/share/perl5/Dahdi/Config/Gen/Modules.pm
/usr/share/perl5/Dahdi/Config/Gen.pm
/usr/share/perl5/Dahdi/Utils.pm
/usr/share/perl5/Dahdi/Span.pm
/usr/share/perl5/Dahdi/Hardware/
/usr/share/perl5/Dahdi/Hardware/USB.pm
/usr/share/perl5/Dahdi/Hardware/PCI.pm
/usr/share/perl5/Dahdi/Hardware.pm
/usr/share/perl5/Dahdi/Xpp.pm
/usr/share/perl5/Dahdi/Xpp/
/usr/share/perl5/Dahdi/Xpp/Xpd.pm
/usr/share/perl5/Dahdi/Xpp/Mpp.pm
/usr/share/perl5/Dahdi/Xpp/Line.pm
/usr/share/perl5/Dahdi/Xpp/Xbus.pm
/usr/share/perl5/Dahdi.pm