Module: kamailio Branch: master Commit: 59c7bf4f43a8cd5dcb0555835a064d88679956c5 URL: https://github.com/kamailio/kamailio/commit/59c7bf4f43a8cd5dcb0555835a064d8… Author: Dmitri Savolainen &lt;savolainen(a)erinaco.ru&gt; Committer: Dmitri Savolainen &lt;savolainen(a)erinaco.ru&gt; Date: 2018-06-01T10:38:40+03:00 dialog: check CSeq careful with track_cseq_updates to avoid null pointer access for malformed messages --- Modified: src/modules/dialog/dlg_cseq.c --- Diff: https://github.com/kamailio/kamailio/commit/59c7bf4f43a8cd5dcb0555835a064d8… Patch: https://github.com/kamailio/kamailio/commit/59c7bf4f43a8cd5dcb0555835a064d8… --- diff --git a/src/modules/dialog/dlg_cseq.c b/src/modules/dialog/dlg_cseq.c index 1e343c9981..b97e8f7123 100644 --- a/src/modules/dialog/dlg_cseq.c +++ b/src/modules/dialog/dlg_cseq.c @@ -73,7 +73,8 @@ static int dlg_cseq_prepare_msg(sip_msg_t *msg) return 1; } - if (parse_headers(msg, HDR_CSEQ_F, 0)==-1) { + if((!msg->cseq && (parse_headers(msg,HDR_CSEQ_F,0)<0 || !msg->cseq)) + || !msg->cseq->parsed){ LM_DBG("parsing cseq header failed\n"); return 2; }