Fixes #4136

lib/core/settings.py

@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.4.3.5"
+VERSION = "1.4.3.6"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)

lib/parse/cmdline.py

@@ -761,6 +761,9 @@ def cmdLineParser(argv=None):
         parser.add_argument("--debug", dest="debug", action="store_true",
             help=SUPPRESS)
 
+        parser.add_argument("--disable-multi", dest="disableMulti", action="store_true",
+            help=SUPPRESS)
+
         parser.add_argument("--disable-precon", dest="disablePrecon", action="store_true",
             help=SUPPRESS)
 

lib/utils/hash.py

@@ -913,6 +913,8 @@ def _bruteProcessVariantB(user, hash_, kwargs, hash_regex, suffix, retVal, found
                 proc_count.value -= 1
 
 def dictionaryAttack(attack_dict):
+    global _multiprocessing
+
     suffix_list = [""]
     custom_wordlist = [""]
     hash_regexes = []
@@ -922,6 +924,9 @@ def dictionaryAttack(attack_dict):
     processException = False
     foundHash = False
 
+    if conf.disableMulti:
+        _multiprocessing = None
+
     for (_, hashes) in attack_dict.items():
         for hash_ in hashes:
             if not hash_:
@@ -1108,7 +1113,7 @@ def dictionaryAttack(attack_dict):
 
                     else:
                         warnMsg = "multiprocessing hash cracking is currently "
-                        warnMsg += "not supported on this platform"
+                        warnMsg += "%s on this platform" % ("not supported" if not conf.disableMulti else "disabled")
                         singleTimeWarnMessage(warnMsg)
 
                         retVal = _queue.Queue()
@@ -1196,7 +1201,7 @@ def dictionaryAttack(attack_dict):
 
                         else:
                             warnMsg = "multiprocessing hash cracking is currently "
-                            warnMsg += "not supported on this platform"
+                            warnMsg += "%s on this platform" % ("not supported" if not conf.disableMulti else "disabled")
                             singleTimeWarnMessage(warnMsg)
 
                             class Value(object):

sqlmap.py

@@ -335,6 +335,12 @@ def main():
             logger.critical(errMsg)
             raise SystemExit
 
+        elif all(_ in excMsg for _ in ("Resource temporarily unavailable", "os.fork()", "dictionaryAttack")):
+            errMsg = "there has been a problem while running the multiprocessing hash cracking. "
+            errMsg += "Please rerun with option '--threads=1'"
+            logger.critical(errMsg)
+            raise SystemExit
+
         elif "can't start new thread" in excMsg:
             errMsg = "there has been a problem while creating new thread instance. "
             errMsg += "Please make sure that you are not running too many processes"