[Bug 1703] New: Chunked file uploads

bugzilla-daemon at bugzilla.mindrot.org bugzilla-daemon at bugzilla.mindrot.org
Sat Jan 23 08:20:40 EST 2010


https://bugzilla.mindrot.org/show_bug.cgi?id=1703

           Summary: Chunked file uploads
           Product: Portable OpenSSH
           Version: 5.3p1
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: sftp
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: juangiordana at gmail.com


Hello,

When I upload PHP files to a server it seems that the files are copied
over to the remote location instead of being transferred to a temporary
location (or buffered) and then moved to the appropriate place. I don't
know how is this supposed to work though, but if these files are being
uploaded to the remote location in chunks then this is probably a cause
of trouble, at least for me.

The thing is that when I upload some files with a relative big size
(~40 KB), I can see some PHP parse errors later on the web server logs
(i.e. PHP parse errors triggered by 'unexpected end of file').

Because of the nature of scripting languages and because of the nature
of PHP being able to be embedded within HTML code my main concern is
that this problem could also lead to code leaks, since if the file
isn't fully transferred, some PHP open/close tag would be missed and
that way the code being leaked to the user's browser/bot.

Regards.

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