Sudo 1.6.9 before 1.8.5, when env_reset is disabled, does not properly check environment variables for the env_delete restriction, which allows local users with sudo permissions to bypass intended command restrictions via a crafted environment variable.
Exploitability
AV:LAC:MAu:SImpact
C:CI:CA:C6.6/AV:L/AC:M/Au:S/C:C/I:C/A:C