openssh/openssh-7.7p1-IPv6_X_forwarding.patch

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# HG changeset patch
# Parent 8df645ca39d64de025d8838c5713812e72308c92
Correctly parse DISPLAY variable for cases where it contains an IPv6 address
(which should - but not always is - in (square) brackets).
bnc#847710 - https://bugzilla.novell.com/show_bug.cgi?id=847710
Index: openssh-8.8p1/channels.c
===================================================================
--- openssh-8.8p1.orig/channels.c
+++ openssh-8.8p1/channels.c
@@ -4776,9 +4776,10 @@ x11_connect_display(struct ssh *ssh)
/*
* Connect to an inet socket. The DISPLAY value is supposedly
* hostname:d[.s], where hostname may also be numeric IP address.
+ * Note that IPv6 numeric addresses contain colons (e.g. ::1:0)
*/
strlcpy(buf, display, sizeof(buf));
- cp = strchr(buf, ':');
+ cp = strrchr(buf, ':');
if (!cp) {
error("Could not find ':' in DISPLAY: %.100s", display);
return -1;
@@ -4793,6 +4794,14 @@ x11_connect_display(struct ssh *ssh)
display);
return -1;
}
+
+ /* Remove brackets surrounding IPv6 addresses if there are any. */
+ if (buf[0] == '[' && (cp = strchr(buf, ']'))) {
+ *cp = 0;
+ cp = buf + 1;
+ } else {
+ cp = buf;
+ }
/* Look up the host address */
memset(&hints, 0, sizeof(hints));