From e10fcd3d372e2b1cc95379aa034431113c0aa7b4 Mon Sep 17 00:00:00 2001
From: jsing <>
Date: Sat, 30 May 2026 17:06:09 +0000
Subject: Disallow wildcard matching of a TLD specified as a FQDN.

Found by Frank Denis.

ok tb@
---
 src/lib/libtls/tls_verify.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lib/libtls/tls_verify.c b/src/lib/libtls/tls_verify.c
index de95ab8117..edf2bcdae3 100644
--- a/src/lib/libtls/tls_verify.c
+++ b/src/lib/libtls/tls_verify.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tls_verify.c,v 1.33 2026/03/28 11:33:33 tb Exp $ */
+/* $OpenBSD: tls_verify.c,v 1.34 2026/05/30 17:06:09 jsing Exp $ */
 /*
  * Copyright (c) 2014 Jeremie Courreges-Anglas <jca@openbsd.org>
  *
@@ -59,6 +59,9 @@ tls_match_name(const char *cert_name, const char *name)
 		/* Disallow "*.bar" */
 		if (next_dot == NULL)
 			return -1;
+		/* Disallow "*.bar." */
+		if (next_dot[1] == '\0')
+			return -1;
 		/* Disallow "*.bar.." */
 		if (next_dot[1] == '.')
 			return -1;
-- 
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