Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf from a user-controlled directory is used with the --chroot option.
1.9.15p5-3ubuntu51.9.15p5-3ubuntu5.24.10.11.9.14p2-1ubuntu11.9.15p5-3ubuntu11.9.15p5-3ubuntu31.9.15p5-3ubuntu41.9.15p5-3ubuntu51.9.15p5-3ubuntu5.24.04.11.9.15p5-3ubuntu51.9.16p2-1ubuntu11.9.16p2-1ubuntu1.1Exploitability
AV:LAC:LPR:NUI:NScope
S:CImpact
C:HI:HA:HCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H