scp: disallow empty incoming filename or "."

Closes: #919101

1 files changed, 2 insertions, 1 deletions

diff --git a/scp.c b/scp.c
index ed2864250..7163d33dc 100644
--- a/scp.c
+++ b/scp.c
@@ -1114,7 +1114,8 @@ sink(int argc, char **argv)
                         SCREWUP("size out of range");
                 size = (off_t)ull;
 
-                if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
+                if (*cp == '\0' || strchr(cp, '/') != NULL ||
+                    strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) {
                         run_err("error: unexpected filename: %s", cp);
                         exit(1);
                 }