[Bug 3061] New: requesting invalid terminal modes no longer aborts connection

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3061

            Bug ID: 3061
           Summary: requesting invalid terminal modes no longer aborts
                    connection
           Product: Portable OpenSSH
           Version: 8.0p1
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: sshd
          Assignee: unassigned-bugs at mindrot.org
          Reporter: mwhudson at debian.org

Created attachment 3312
  --> https://bugzilla.mindrot.org/attachment.cgi?id=3312&action=edit
test case using golang.org/x/crypto

Running the attach test go test case against "OpenSSH_7.6p1
Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017" (i.e. Ubuntu 18.04)
yields:

2019/08/29 15:33:23 request for pseudo terminal failed: EOF
exit status 1

Running it against "OpenSSH_7.9p1 Ubuntu-10, OpenSSL 1.1.1b  26 Feb
2019" (i.e. Ubuntu 19.10) exits with code 0.

Going over the git history, it looks like this 1) could be a
consequence of the translation of ssh_tty_parse_modes to the sshbuf API
2) does not seem intentional.

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