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Fixes #4464

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This commit is contained in:
Miroslav Stampar
2020-12-07 12:28:49 +01:00
parent 760563dbd1
commit 8a783702d9
2 changed files with 4 additions and 2 deletions
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4
lib/techniques/error/use.py
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@@ -80,6 +80,7 @@ def _oneShotErrorUse(expression, field=None, chunkTest=False):
debugMsg = "searching for error chunk length..."
logger.debug(debugMsg)
seen = set()
current = MAX_ERROR_CHUNK_LENGTH
while current >= MIN_ERROR_CHUNK_LENGTH:
testChar = str(current % 10)
@@ -91,6 +92,7 @@ def _oneShotErrorUse(expression, field=None, chunkTest=False):
testQuery = "SELECT %s" % (agent.hexConvertField(testQuery) if conf.hexConvert else testQuery)
result = unArrayizeValue(_oneShotErrorUse(testQuery, chunkTest=True))
seen.add(current)
if (result or "").startswith(testChar):
if result == testChar * current:
@@ -99,7 +101,7 @@ def _oneShotErrorUse(expression, field=None, chunkTest=False):
else:
result = re.search(r"\A\w+", result).group(0)
candidate = len(result) - len(kb.chars.stop)
current = candidate if candidate != current else current - 1
current = candidate if candidate != current and candidate not in seen else current - 1
else:
current = current // 2