--- shadow-4.1.5.1/libmisc/chkname.c 2015-12-15 16:05:25.691984925 -0800 +++ shadow-4.1.5.1/libmisc/chkname.c 2015-12-15 16:07:01.071982033 -0800 @@ -52,12 +52,13 @@ * User/group names must match [a-z_][a-z0-9_-]*[$] */ if (('\0' == *name) || - !((('a' <= *name) && ('z' >= *name)) || ('_' == *name))) { + !((('a' <= *name) && ('z' >= *name)) || ('_' == *name) || (('A' <= *name) && ('Z' >= *name)))) { return false; } while ('\0' != *++name) { if (!(( ('a' <= *name) && ('z' >= *name) ) || + ( ('A' <= *name) && ('Z' >= *name) ) || ( ('0' <= *name) && ('9' >= *name) ) || ('_' == *name) || ('-' == *name) ||