(for 4.9.3) CVE-2018-14880/OSPFv3: Fix a bounds check

[tcpdump] / print-smb.c

diff --git a/print-smb.c b/print-smb.c
index 5af01aea06d55eee4a4abce331ebc421cf9b6476..944b8d28abfc0c4dc723f477c9e794fcb9f79ac0 100644 (file)
--- a/print-smb.c
+++ b/print-smb.c
@@ -371,16 +371,21 @@ print_trans(netdissect_options *ndo,
     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
     if (bcc > 0) {
        smb_fdata(ndo, data1 + 2, f2, maxbuf - (paramlen + datalen), unicodestr);
-
-       if (strcmp((const char *)(data1 + 2), "\\MAILSLOT\\BROWSE") == 0) {
+#define MAILSLOT_BROWSE_STR "\\MAILSLOT\\BROWSE"
+       ND_TCHECK2(*(data1 + 2), strlen(MAILSLOT_BROWSE_STR) + 1);
+       if (strcmp((const char *)(data1 + 2), MAILSLOT_BROWSE_STR) == 0) {
            print_browse(ndo, param, paramlen, data, datalen);
            return;
        }
+#undef MAILSLOT_BROWSE_STR
 
-       if (strcmp((const char *)(data1 + 2), "\\PIPE\\LANMAN") == 0) {
+#define PIPE_LANMAN_STR "\\PIPE\\LANMAN"
+       ND_TCHECK2(*(data1 + 2), strlen(PIPE_LANMAN_STR) + 1);
+       if (strcmp((const char *)(data1 + 2), PIPE_LANMAN_STR) == 0) {
            print_ipc(ndo, param, paramlen, data, datalen);
            return;
        }
+#undef PIPE_LANMAN_STR
 
        if (paramlen)
            smb_fdata(ndo, param, f3, min(param + paramlen, maxbuf), unicodestr);