security-and-privacy/mat2
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Make the parsing of office format's metadata more robust

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This commit is contained in:
jvoisin 2018-06-10 20:20:00 +02:00
parent 8c7979aae3
commit 7dad77a785
1 changed files with 12 additions and 4 deletions
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12
libmat2/office.py
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@ -78,8 +78,12 @@ class MSOfficeParser(ArchiveBasedAbstractParser):
for item in zipin.infolist():
if item.filename.startswith('docProps/') and item.filename.endswith('.xml'):
content = zipin.read(item).decode('utf-8')
for (key, value) in re.findall(r"<(.+)>(.+)</\1>", content, re.I):
try:
results = re.findall(r"<(.+)>(.+)</\1>", content, re.I|re.M)
for (key, value) in results:
metadata[key] = value
except TypeError: # We didn't manage to parse the xml file
pass
if not metadata: # better safe than sorry
metadata[item] = 'harmful content'
@ -140,8 +144,12 @@ class LibreOfficeParser(ArchiveBasedAbstractParser):
for item in zipin.infolist():
if item.filename == 'meta.xml':
content = zipin.read(item).decode('utf-8')
for (key, value) in re.findall(r"<((?:meta|dc|cp).+?)>(.+)</\1>", content, re.I):
try:
results = re.findall(r"<((?:meta|dc|cp).+?)>(.+)</\1>", content, re.I|re.M)
for (key, value) in results:
metadata[key] = value
except TypeError: # We didn't manage to parse the xml file
pass
if not metadata: # better safe than sorry
metadata[item] = 'harmful content'
for key, value in self._get_zipinfo_meta(item).items():