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-rw-r--r--lib/Net/IMAP/InterIMAP.pm11
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/Net/IMAP/InterIMAP.pm b/lib/Net/IMAP/InterIMAP.pm
index f0dd2df..b01e1a9 100644
--- a/lib/Net/IMAP/InterIMAP.pm
+++ b/lib/Net/IMAP/InterIMAP.pm
@@ -464,6 +464,7 @@ sub new($%) {
$self->logger('S: xxx ', $IMAP_text);
$self->{debug} = $dbg;
}
+ $self->{_STATE} = 'AUTH';
unless ($IMAP_text =~ /\A\Q$IMAP_cond\E \[CAPABILITY /) {
# refresh the CAPABILITY list since the previous one had only pre-login capabilities
@@ -471,7 +472,15 @@ sub new($%) {
$self->capabilities();
}
}
- $self->{_STATE} = 'AUTH';
+ elsif ($IMAP_cond eq 'PREAUTH') {
+ if ($self->{type} eq 'imap' and $self->{STARTTLS} != 0) {
+ $self->fail("PREAUTH greeting on plaintext connection? MiTM in action? Aborting, set \"STARTTLS = NO\" to ignore.");
+ }
+ $self->{_STATE} = 'AUTH';
+ }
+ else {
+ $self->panic();
+ }
# Don't send the COMPRESS command before STARTTLS or AUTH, as per RFC 4978
if ($self->{compress} // 1 and