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GoogleOSV:PSF-2021-2HistoryMay 06, 2021 - 12:00 a.m.
ipaddress leading zeros in IPv4 address
2021-05-0600:00:00
Google
osv.dev
20
python
ipaddress library
vulnerability
leading zero
octets
ip addresses
access control
In Python before 3,9,5, the ipaddress library mishandles leading zero characters in the octets of an IP address string. This (in some situations) allows attackers to bypass access control that is based on IP addresses.
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