wireshark: CVE-2023-2856 VMS TCPIPtrace file parser crash

Upstream-Status: Backport from https://gitlab.com/wireshark/wireshark/-/commit/db5135826de3a5fdb3618225c2ff02f4207012ca

Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-networking/recipes-support/wireshark/files/CVE-2023-2856.patch

@@ -0,0 +1,69 @@
+From db5135826de3a5fdb3618225c2ff02f4207012ca Mon Sep 17 00:00:00 2001
+From: Guy Harris <gharris@sonic.net>
+Date: Thu, 18 May 2023 15:03:23 -0700
+Subject: [PATCH] vms: fix the search for the packet length field.
+
+The packet length field is of the form
+
+    Total Length = DDD = ^xXXX
+
+where "DDD" is the length in decimal and "XXX" is the length in
+hexadecimal.
+
+Search for "length ". not just "Length", as we skip past "Length ", not
+just "Length", so if we assume we found "Length " but only found
+"Length", we'd skip past the end of the string.
+
+While we're at it, fail if we don't find a length field, rather than
+just blithely acting as if the packet length were zero.
+
+Fixes #19083.
+
+Upstream-Status: Backport [https://gitlab.com/wireshark/wireshark/-/commit/db5135826de3a5fdb3618225c2ff02f4207012ca]
+CVE: CVE-2023-2856
+
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ wiretap/vms.c | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/wiretap/vms.c b/wiretap/vms.c
+index 0aa83ea..5f5fdbb 100644
+--- a/wiretap/vms.c
++++ b/wiretap/vms.c
+@@ -318,6 +318,7 @@ parse_vms_packet(FILE_T fh, wtap_rec *rec, Buffer *buf, int *err, gchar **err_in
+ {
+     char    line[VMS_LINE_LENGTH + 1];
+     int     num_items_scanned;
++    gboolean have_pkt_len = FALSE;
+     guint32 pkt_len = 0;
+     int     pktnum;
+     int     csec = 101;
+@@ -374,7 +375,7 @@ parse_vms_packet(FILE_T fh, wtap_rec *rec, Buffer *buf, int *err, gchar **err_in
+                 return FALSE;
+             }
+         }
+-        if ( (! pkt_len) && (p = strstr(line, "Length"))) {
++        if ( (! have_pkt_len) && (p = strstr(line, "Length "))) {
+             p += sizeof("Length ");
+             while (*p && ! g_ascii_isdigit(*p))
+                 p++;
+@@ -390,9 +391,15 @@ parse_vms_packet(FILE_T fh, wtap_rec *rec, Buffer *buf, int *err, gchar **err_in
+                 *err_info = g_strdup_printf("vms: Length field '%s' not valid", p);
+                 return FALSE;
+             }
++            have_pkt_len = TRUE;
+             break;
+         }
+     } while (! isdumpline(line));
++    if (! have_pkt_len) {
++        *err = WTAP_ERR_BAD_FILE;
++        *err_info = g_strdup_printf("vms: Length field not found");
++        return FALSE;
++    }
+     if (pkt_len > WTAP_MAX_PACKET_SIZE_STANDARD) {
+         /*
+          * Probably a corrupt capture file; return an error,
+-- 
+2.25.1
+

meta-networking/recipes-support/wireshark/wireshark_3.4.12.bb

@@ -17,6 +17,7 @@ SRC_URI += " \
     file://0004-lemon-Remove-line-directives.patch \
     file://CVE-2022-3190.patch \
     file://CVE-2023-2855.patch \
+    file://CVE-2023-2856.patch \
 "
 
 UPSTREAM_CHECK_URI = "https://1.as.dl.wireshark.org/src"