Red Hat Bugzilla – Bug 457274
filezilla: unhandled SSL/TLS errors causing unnoticed incomplete downloads
Last modified: 2008-07-31 21:49:48 EDT
FileZilla Client version 220.127.116.11 fixes a minor security issue:
Quoting upstream news page:
FileZilla 18.104.22.168 fixes a vulnerability regarding the way some errors are
handled on SSL/TLS secured data transfers.
If the data connection of a transfer gets closed, FileZilla did not check if the
server performed an orderly TLS shutdown.
An attacker could send spoofed FIN packets to the client. Even though GnuTLS
detects this with GNUTLS_E_UNEXPECTED_PACKET_LENGTH, FileZilla did not record a
transfer failure in all cases.
Unfortunately not all servers perform an orderly SSL/TLS shutdown. Since this
cannot be distinguished from an attack, FileZilla will not be able to download
listings or files from such servers.
All versions prior to 22.214.171.124 are affected. This vulnerability has been fixed in
filezilla-126.96.36.199-1.fc9 has been pushed to the Fedora 9 testing repository. If problems still persist, please make note of it in this bug report.
If you want to test the update, you can install it with
su -c 'yum --enablerepo=updates-testing update filezilla'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F9/FEDORA-2008-6865
filezilla-188.8.131.52-1.fc8 has been pushed to the Fedora 8 stable repository. If problems still persist, please make note of it in this bug report.
filezilla-184.108.40.206-1.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.