Be 3130 CVE 2021 4189 #36
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[3.6] bpo-43285 Make ftplib not trust the PASV response. (pythonGH-24838) (G… …H-24881) (pythonGH-24882) The IPv4 address value returned from the server in response to the PASV command should not be trusted. This prevents a malicious FTP server from using the response to probe IPv4 address and port combinations on the client network. Instead of using the returned address, we use the IP address we're already connected to. This is the strategy other ftp clients adopted, and matches the only strategy available for the modern IPv6 EPSV command where the server response must return a port number and nothing else. For the rare user who _wants_ this ugly behavior, set a `trust_server_pasv_ipv4_address` attribute on your `ftplib.FTP` instance to True.. (cherry picked from commit 0ab152c) Co-authored-by: Gregory P. Smith <greg@krypto.org> (cherry picked from commit 664d1d1)
Various things that need to be fixed to make things work in Python2 land
rickprice
requested review from
MatthewZMD
and removed request for
icanhasmath
MatthewZMD
approved these changes
Feb 13, 2024
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Fixes for CVE-2021-4189