new file mode 100644
@@ -0,0 +1,81 @@
+From ef9c79ae81b00a63aa8638076ec81dc9482972e9 Mon Sep 17 00:00:00 2001
+From: John Thacker <johnthacker@gmail.com>
+Date: Thu, 10 Aug 2023 05:29:09 -0400
+Subject: [PATCH] btsdp: Keep offset advancing
+
+hf_data_element_value is a FT_NONE, so we can add the item with
+the expected length and get_hfi_length() will adjust the length
+without throwing an exception. There's no need to add it with
+zero length and call proto_item_set_len. Also, don't increment
+the offset by 0 instead of the real length when there isn't
+enough data in the packet, as that can lead to failing to advance
+the offset.
+
+When dissecting a sequence type (sequence or alternative) and
+recursing into the sequence member, instead of using the main
+packet tvb directly, create a subset using the indicated length
+of the sequence. That will properly throw an exception if a
+contained item is larger than the containing sequence, instead of
+dissecting the same bytes as several different items (inside
+the sequence recursively, as well in the outer loop.)
+
+Fix #19258
+
+Upstream-Status: Backport [https://gitlab.com/wireshark/wireshark/-/commit/ef9c79ae81b00a63aa8638076ec81dc9482972e9]
+CVE: CVE-2023-4511
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ epan/dissectors/packet-btsdp.c | 15 ++++++++-------
+ 1 file changed, 8 insertions(+), 7 deletions(-)
+
+diff --git a/epan/dissectors/packet-btsdp.c b/epan/dissectors/packet-btsdp.c
+index 397ece7..eb7f5fa 100644
+--- a/epan/dissectors/packet-btsdp.c
++++ b/epan/dissectors/packet-btsdp.c
+@@ -1925,13 +1925,11 @@ dissect_data_element(proto_tree *tree, proto_tree **next_tree,
+ offset += len - length;
+ }
+
+- pitem = proto_tree_add_item(ptree, hf_data_element_value, tvb, offset, 0, ENC_NA);
++ pitem = proto_tree_add_item(ptree, hf_data_element_value, tvb, offset, length, ENC_NA);
+ if (length > tvb_reported_length_remaining(tvb, offset)) {
+ expert_add_info(pinfo, pitem, &ei_data_element_value_large);
+- length = 0;
+- }
+- proto_item_set_len(pitem, length);
+- if (length == 0)
++ proto_item_append_text(pitem, ": MISSING");
++ } else if (length == 0)
+ proto_item_append_text(pitem, ": MISSING");
+
+ if (next_tree) *next_tree = proto_item_add_subtree(pitem, ett_btsdp_data_element_value);
+@@ -3523,6 +3521,8 @@ dissect_sdp_type(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
+ gint bytes_to_go = size;
+ gint first = 1;
+ wmem_strbuf_t *substr;
++ tvbuff_t *next_tvb = tvb_new_subset_length(tvb, offset, size);
++ gint next_offset = 0;
+
+ ti = proto_tree_add_item(next_tree, (type == 6) ? hf_data_element_value_sequence : hf_data_element_value_alternative,
+ tvb, offset, size, ENC_NA);
+@@ -3537,14 +3537,15 @@ dissect_sdp_type(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
+ first = 0;
+ }
+
+- size = dissect_sdp_type(st, pinfo, tvb, offset, attribute, service_uuid,
++ size = dissect_sdp_type(st, pinfo, next_tvb, next_offset,
++ attribute, service_uuid,
+ service_did_vendor_id, service_did_vendor_id_source,
+ service_hdp_data_exchange_specification, service_info, &substr);
+ if (size < 1) {
+ break;
+ }
+ wmem_strbuf_append_printf(info_buf, "%s ", wmem_strbuf_get_str(substr));
+- offset += size ;
++ next_offset += size;
+ bytes_to_go -= size;
+ }
+
+--
+2.25.1
+
@@ -27,6 +27,7 @@ SRC_URI += " \
file://CVE-2023-2906.patch \
file://CVE-2023-1992.patch \
file://CVE-2022-4345.patch \
+ file://CVE-2023-4511.patch \
"
UPSTREAM_CHECK_URI = "https://1.as.dl.wireshark.org/src"