1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
local stdnse = require "stdnse"
local tab = require "tab"
local table = require "table"
-- Defined in mysql-audit.nse
-- makes nse-check-globals complain, but that's ok
local test = test
TEMPLATE_NAME="CIS MySQL Benchmarks v1.0.2"
-- These accounts should be treated as admins and excluded from some of the results
ADMIN_ACCOUNTS={"root", "debian-sys-maint"}
-- Checks whether a resultset is empty or not
local function isEmpty(rows)
if ( #rows > 0 ) then return false end
return true
end
-- Extracts a column from a row and return all occurances as an array
local function col2tab(rs, cname)
local tab = {}
local cpos
for i=1, #rs.cols do
if ( rs.cols[i].name == cname ) then
cpos = i
break
end
end
if ( not(cpos) ) then
return
end
for _, row in ipairs(rs.rows) do table.insert(tab, row[cpos]) end
return tab
end
local function createINstmt(tab)
local tab2 = {}
for i=1, #tab do tab2[i] = ("'%s'"):format(tab[i]) end
return table.concat(tab2, ",")
end
-- This next section contains all the tests
-- Logging
test { id="3.1", desc="Skip symbolic links", sql="SHOW variables WHERE Variable_name = 'log_error' AND Value IS NOT NULL", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="3.2", desc="Logs not on system partition", sql="SHOW variables WHERE Variable_name = 'log_bin' AND Value <> 'OFF'", check=function(rowstab)
local log = col2tab(rowstab[1], 'Value')
return { status = isEmpty(rowstab[1]), result = log, review = not(isEmpty(rowstab[1])) }
end
}
test { id="3.2", desc="Logs not on database partition", sql="SHOW variables WHERE Variable_name = 'log_bin' AND Value <> 'OFF'", check=function(rowstab)
local log = col2tab(rowstab[1], 'Value')
return { status = isEmpty(rowstab[1]), result = log, review = not(isEmpty(rowstab[1])) }
end
}
-- General
test { id="4.1", desc="Supported version of MySQL", sql="SHOW VARIABLES like 'version'", check=function(rowstab)
local ver = col2tab(rowstab[1], 'Value')[1]
return { status = true, review = true, result = ("Version: %s"):format(ver) }
end
}
test { id="4.4", desc="Remove test database", sql="SHOW DATABASES like 'test'", check=function(rowstab) return { status = isEmpty(rowstab[1]) } end }
test { id="4.5", desc="Change admin account name", sql="SELECT user FROM mysql.user WHERE user='root';", check=function(rowstab) return { status = isEmpty(rowstab[1]) } end }
test { id="4.7", desc="Verify Secure Password Hashes", sql="SELECT DISTINCT user, password from mysql.user where length(password) < 41 AND length(password) > 0", check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having weak password hashes"
return { status = isEmpty(rowstab[1]), result = users }
end
}
test { id="4.9", desc="Wildcards in user hostname", sql="select user from mysql.user where host = '%'", check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found with wildcards in hostname"
return { status = isEmpty(rowstab[1]), result = users }
end
}
test { id="4.10", desc="No blank passwords", sql="select distinct user, password from mysql.user where length(password) = 0 or password is null", check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having blank/empty passwords"
return { status = isEmpty(rowstab[1]), result = users }
end
}
test { id="4.11", desc="Anonymous account", sql="select distinct user from mysql.user where user =''", check=function(rowstab) return { status = isEmpty(rowstab[1]) } end }
-- MySQL Permissions
test { id="5.1", desc="Access to mysql database",
sql = { "SELECT user, host FROM mysql.db WHERE db = 'mysql' and ((Select_priv = 'Y') or (Insert_priv = 'Y') " ..
"or (Update_priv = 'Y') or (Delete_priv = 'Y') or (Create_priv = 'Y') or (Drop_priv = 'Y'))",
"SELECT user, host FROM mysql.user WHERE (Select_priv = 'Y') or (Insert_priv = 'Y') or " ..
"(Update_priv = 'Y') or (Delete_priv = 'Y') or (Create_priv = 'Y') or (Drop_priv = 'Y')" },
check = function(rowstab)
local result = tab.new(2)
tab.addrow(result, "user", "host")
local rs = rowstab[1]
for _, row in ipairs(rs.rows) do
tab.addrow( result, row[1], row[2] )
end
return { status = false, review = true, result = { tab.dump(result), name="Verify the following users that have access to the MySQL database" } }
end
}
test { id="5.2", desc="Do not grant FILE privileges to non Admin users",
sql=("SELECT user, host FROM mysql.user WHERE File_priv = 'Y' AND user NOT IN (%s)"):format(createINstmt(ADMIN_ACCOUNTS)),
check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having the FILE privilege"
return { status = isEmpty(rowstab[1]), result = users, review = not(isEmpty(rowstab[1])) }
end
}
test { id="5.3", desc="Do not grant PROCESS privileges to non Admin users",
sql=("SELECT user, host FROM mysql.user WHERE Process_priv = 'Y' AND user NOT IN (%s)"):format(createINstmt(ADMIN_ACCOUNTS)),
check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having the PROCESS privilege"
return { status = isEmpty(rowstab[1]), result = users, review = not(isEmpty(rowstab[1])) }
end
}
test { id="5.4", desc="Do not grant SUPER privileges to non Admin users",
sql=("SELECT user, host FROM mysql.user WHERE Super_priv = 'Y' AND user NOT IN (%s)"):format(createINstmt(ADMIN_ACCOUNTS)),
check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having the SUPER privilege"
return { status = isEmpty(rowstab[1]), result = users, review = not(isEmpty(rowstab[1])) }
end
}
test { id="5.5", desc="Do not grant SHUTDOWN privileges to non Admin users",
sql=("SELECT user, host FROM mysql.user WHERE Shutdown_priv = 'Y' AND user NOT IN (%s)"):format(createINstmt(ADMIN_ACCOUNTS)),
check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having the SHUTDOWN privilege"
return { status = isEmpty(rowstab[1]), result = users, review = not(isEmpty(rowstab[1])) }
end
}
test { id="5.6", desc="Do not grant CREATE USER privileges to non Admin users",
sql=("SELECT user, host FROM mysql.user WHERE Create_user_priv = 'Y' AND user NOT IN (%s)"):format(createINstmt(ADMIN_ACCOUNTS)),
check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having the CREATE USER privilege"
return { status = isEmpty(rowstab[1]), result = users, review = not(isEmpty(rowstab[1])) }
end
}
test { id="5.7", desc="Do not grant RELOAD privileges to non Admin users",
sql=("SELECT user, host FROM mysql.user WHERE Reload_priv = 'Y' AND user NOT IN (%s)"):format(createINstmt(ADMIN_ACCOUNTS)),
check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having the RELOAD privilege"
return { status = isEmpty(rowstab[1]), result = users, review = not(isEmpty(rowstab[1])) }
end
}
test { id="5.8", desc="Do not grant GRANT privileges to non Admin users",
sql=("SELECT user, host FROM mysql.user WHERE Grant_priv = 'Y' AND user NOT IN (%s)"):format(createINstmt(ADMIN_ACCOUNTS)),
check=function(rowstab)
local users = col2tab(rowstab[1], 'user')
users.name = ( #users > 0 ) and "The following users were found having the GRANT privilege"
return { status = isEmpty(rowstab[1]), result = users, review = not(isEmpty(rowstab[1])) }
end
}
-- MySQL Configuraiton options
test { id="6.2", desc="Disable Load data local", sql="SHOW variables WHERE Variable_name = 'local_infile' AND Value='OFF'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="6.3", desc="Disable old password hashing", sql="SHOW variables WHERE Variable_name = 'old_passwords' AND Value='OFF'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="6.4", desc="Safe show database", sql="SHOW variables WHERE Variable_name = 'safe_show_database' AND Value='ON'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="6.5", desc="Secure auth", sql="SHOW variables WHERE Variable_name = 'secure_auth' AND Value='ON'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="6.6", desc="Grant tables", sql="SHOW variables WHERE Variable_name = 'skip_grant_tables' AND Value='OFF'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="6.7", desc="Skip merge", sql="SHOW variables WHERE Variable_name = 'have_merge_engine' AND Value='DISABLED'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="6.8", desc="Skip networking", sql="SHOW variables WHERE Variable_name = 'skip_networking' AND Value='ON'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="6.9", desc="Safe user create", sql="select @@global.sql_mode, @@session.sql_mode FROM dual WHERE @@session.sql_mode='NO_AUTO_CREATE_USER' AND @@global.sql_mode='NO_AUTO_CREATE_USER'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
test { id="6.10", desc="Skip symbolic links", sql="SHOW variables WHERE Variable_name = 'have_symlink' AND Value='DISABLED'", check=function(rowstab)
return { status = not(isEmpty(rowstab[1])) }
end
}
|
