1 files changed, 6 insertions, 3 deletions

diff --git a/krl.c b/krl.c
index 6d86c2097..e4e1788f4 100644
--- a/krl.c
+++ b/krl.c
@@ -14,7 +14,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $OpenBSD: krl.c,v 1.7 2013/01/25 05:00:27 krw Exp $ */
+/* $OpenBSD: krl.c,v 1.8 2013/01/25 10:22:19 djm Exp $ */
 
 #include "includes.h"
 
@@ -1148,8 +1148,11 @@ is_key_revoked(struct ssh_krl *krl, const Key *key)
                 return -1;
         }
 
-        /* Legacy cert formats lack serial numbers */
-        if (key_cert_is_legacy(key))
+        /*
+         * Legacy cert formats lack serial numbers. Zero serials numbers
+         * are ignored (it's the default when the CA doesn't specify one).
+         */
+        if (key_cert_is_legacy(key) || key->cert->serial == 0)
                 return 0;
 
         bzero(&rs, sizeof(rs));