Описание
lxml: Default configuration of iterparse() and ETCompatXMLParser() allows XXE to local files
Impact
Using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files.
Patches
lxml 6.1.0 changes the default to resolve_entities='internal', thus disallowing local file access by default.
Workarounds
Setting the resolve_entities option explicitly to resolve_entities='internal' or resolve_entities=False disables the local file access.
Resources
Original report: https://bugs.launchpad.net/lxml/+bug/2146291
The default option was changed to resolve_entities='internal' for the normal XML and HTML parsers in lxml 5.0. The default was not changed for iterparse() and ETCompatXMLParser() at the time. lxml 6.1 makes the safe option the default for all parsers.
Пакеты
lxml
< 6.1.0
6.1.0
Связанные уязвимости
lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files. Setting the resolve_entities option explicitly to resolve_entities='internal' or resolve_entities=False disables the local file access. This vulnerability is fixed in 6.1.0.
lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files. Setting the resolve_entities option explicitly to resolve_entities='internal' or resolve_entities=False disables the local file access. This vulnerability is fixed in 6.1.0.
lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files. Setting the resolve_entities option explicitly to resolve_entities='internal' or resolve_entities=False disables the local file access. This vulnerability is fixed in 6.1.0.
lxml: Default configuration of iterparse() and ETCompatXMLParser() allows XXE to local files
lxml is a library for processing XML and HTML in the Python language. ...