Failure to recognize a valid Debian version

[pombredanne]

>>> from univers.debian import Version
>>> v = Version.from_string("1:1.12_1.12.6-1+deb9u1build0.18.04.1" )
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/pombreda/w421/vulnerablecode/venv/lib/python3.8/site-packages/univers/debian.py", line 130, in from_string
    raise ValueError('Invalid version string: "{}"'.format(version))
ValueError: Invalid version string: "1:1.12_1.12.6-1+deb9u1build0.18.04.1"
>>> 

This was found in https://ubuntu.com/security/CVE-2018-1999023 for https://tracker.debian.org/pkg/wesnoth-1.12

[pombredanne]

See some external implementations and pointers:

• https://github.com/cfs-pure/debian_version_compare who kindly added an Apache license https://github.com/cfs-pure/debian_version_compare/issues/1
• https://github.com/hyperledger/indy-node/blob/ccbd47d411e8678e624d81aed179965a3c982054/indy_node/utils/node_control_utils.py#L56
• https://github.com/gopythongo/gopythongo/tree/c3b576931c29488b6df1578c840b458ca9c6ff06/src/py/gopythongo/versioners/parsers which has a bunch of other versions implemented
• https://github.com/a4pizza/raptly/blob/master/src/main/python/raptly/debian_version.py
• https://github.com/xolox/python-deb-pkg-tools/tree/master/deb_pkg_tools/version
• https://github.com/sdumetz/node-deb-version-compare
• https://github.com/josch/debversioncomp : "check all the available debian version comparison algorithms for correctness "
• https://github.com/mwanner/rust-debian/blob/master/src/version.rs