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Improved Multipart Form handling #5598

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Merged
stamparm merged 3 commits into from
Jan 9, 2024
Merged

Improved Multipart Form handling #5598

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855e7af
improved multipart marker
rohitkumarankam Jan 9, 2024
13e293c
Improved file field handling in Multipart forms
rohitkumarankam Jan 9, 2024
c47aa58
improved dumb LF to CRLF converter
rohitkumarankam Jan 9, 2024
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2 changes: 1 addition & 1 deletion lib/core/target.py
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Original file line number Diff line number Diff line change
Expand Up @@ -226,7 +226,7 @@ def process(match, repl):
if not (kb.processUserMarks and kb.customInjectionMark in conf.data):
conf.data = getattr(conf.data, UNENCODED_ORIGINAL_VALUE, conf.data)
conf.data = conf.data.replace(kb.customInjectionMark, ASTERISK_MARKER)
conf.data = re.sub(r"(?si)((Content-Disposition[^\n]+?name\s*=\s*[\"']?(?P<name>[^\"'\r\n]+)[\"']?).+?)((%s)+--)" % ("\r\n" if "\r\n" in conf.data else '\n'), functools.partial(process, repl=r"\g<1>%s\g<4>" % kb.customInjectionMark), conf.data)
conf.data = re.sub(r"(?si)((Content-Disposition[^\n]+?name\s*=\s*[\"']?(?P<name>[^\"'\r\n]+)[\"']?).+?)((%s)--)" % ("\r\n" if "\r\n" in conf.data else '\n'), lambda match: match.group(1) + (kb.customInjectionMark if 'filename' not in match.group(0) else '') + match.group(4), conf.data)

if not kb.postHint:
if kb.customInjectionMark in conf.data: # later processed
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4 changes: 4 additions & 0 deletions thirdparty/multipart/multipartpost.py
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Expand Up @@ -74,6 +74,10 @@ def http_request(self, request):
part = match.group(0)
if b'\r' not in part:
request.data = request.data.replace(part, part.replace(b'\n', b"\r\n"))
for match in re.finditer(b"(Content-Type[^\\n]+[\\n|\\r|\\r\\n]+)",request.data):
part = match.group(0)
if b'\r' not in part:
request.data = request.data.replace(part, part.replace(b'\n', b"\r\n"))

return request

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