bpo-43285: Make ftplib not trust the PASV response.The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>

)bpo-43285: Make ftplib not trust the PASV response.The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>

bpo-43285: Make ftplib not trust the PASV response.The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>

…H-24881)bpo-43285: Make ftplib not trust the PASV response.The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>

) (pythonGH-24881)bpo-43285: Make ftplib not trust the PASV response.The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>(cherry picked from commit664d1d1)Co-authored-by: Gregory P. Smith <greg@krypto.org>

) (pythonGH-24881)bpo-43285: Make ftplib not trust the PASV response.The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>(cherry picked from commit664d1d1)Co-authored-by: Gregory P. Smith <greg@krypto.org>

…H-24881) (GH-24882)The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>(cherry picked from commit664d1d1)

…H-24881) (GH-24883)The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>(cherry picked from commit664d1d1)

) (pythonGH-24881) (pythonGH-24882)The IPv4 address value returned from the server in response to the PASV commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit0ab152c)Co-authored-by: Gregory P. Smith <greg@krypto.org>(cherry picked from commit664d1d1)Rebased for Python 2.7 by Michał Górny <mgorny@gentoo.org>

[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 commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit664d1d1)

[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 commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit664d1d1)

[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 commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit664d1d1)

[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 commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit664d1d1)

[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 commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit664d1d1)

[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 commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit664d1d1)

[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 commandshould not be trusted.  This prevents a malicious FTP server from using theresponse to probe IPv4 address and port combinations on the client network.Instead of using the returned address, we use the IP address we'realready connected to.  This is the strategy other ftp clients adopted,and matches the only strategy available for the modern IPv6 EPSV commandwhere 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 commit664d1d1)