gstreamer1.0-plugins-base: fix CVE-2025-47806 & CVE-2025-47808

Backport fixes for:

* CVE-2025-47806 - Upstream-Status: Backport from  da4380c4df
* CVE-2025-47808 - Upstream-Status: Backport from  6b19f11751

(From OE-Core rev: 974670b83970f78edcb9f7d09ba34ec3a327320a)

Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-base/CVE-2025-47806.patch

@@ -0,0 +1,50 @@
+From da4380c4df0e00f8d0bad569927bfc7ea35ec37d Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
+Date: Thu, 8 May 2025 12:46:40 +0300
+Subject: [PATCH] subparse: Make sure that subrip time string is not too long
+ before zero-padding
+
+Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4419
+Fixes CVE-2025-47806
+
+Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9135>
+
+CVE: CVE-2025-47806
+Upstream-Status: Backport [https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/da4380c4df0e00f8d0bad569927bfc7ea35ec37d]
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ gst/subparse/gstsubparse.c | 11 ++++++++++-
+ 1 file changed, 10 insertions(+), 1 deletion(-)
+
+diff --git a/gst/subparse/gstsubparse.c b/gst/subparse/gstsubparse.c
+index 1d8fa51..81a7f65 100644
+--- a/gst/subparse/gstsubparse.c
++++ b/gst/subparse/gstsubparse.c
+@@ -850,7 +850,7 @@ parse_subrip_time (const gchar * ts_string, GstClockTime * t)
+   g_strdelimit (s, " ", '0');
+   g_strdelimit (s, ".", ',');
+ 
+-  /* make sure we have exactly three digits after he comma */
++  /* make sure we have exactly three digits after the comma */
+   p = strchr (s, ',');
+   if (p == NULL) {
+     /* If there isn't a ',' the timestamp is broken */
+@@ -859,6 +859,15 @@ parse_subrip_time (const gchar * ts_string, GstClockTime * t)
+     return FALSE;
+   }
+ 
++  /* Check if the comma is too far into the string to avoid
++   * stack overflow when zero-padding the sub-second part.
++   *
++   * Allow for 3 digits of hours just in case. */
++  if ((p - s) > sizeof ("hhh:mm:ss,")) {
++    GST_WARNING ("failed to parse subrip timestamp string '%s'", s);
++    return FALSE;
++  }
++
+   ++p;
+   len = strlen (p);
+   if (len > 3) {
+-- 
+2.50.1
+

meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-base/CVE-2025-47808.patch

@@ -0,0 +1,36 @@
+From 6b19f117518a765a25c99d1c4b09f2838a8ed0c9 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
+Date: Thu, 8 May 2025 09:04:52 +0300
+Subject: [PATCH] tmplayer: Don't append NULL + 1 to the string buffer when
+ parsing lines without text
+
+Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4417
+Fixes CVE-2025-47808
+
+Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9132>
+
+CVE: CVE-2025-47808
+Upstream-Status: Backport [https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/6b19f117518a765a25c99d1c4b09f2838a8ed0c9]
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ gst/subparse/tmplayerparse.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/gst/subparse/tmplayerparse.c b/gst/subparse/tmplayerparse.c
+index 807e332..a9225d3 100644
+--- a/gst/subparse/tmplayerparse.c
++++ b/gst/subparse/tmplayerparse.c
+@@ -125,7 +125,9 @@ tmplayer_parse_line (ParserState * state, const gchar * line, guint line_num)
+        * durations from the start times anyway, so as long as the parser just
+        * forwards state->start_time by duration after it pushes the line we
+        * are about to return it will all be good. */
+-      g_string_append (state->buf, text_start + 1);
++      if (text_start) {
++        g_string_append (state->buf, text_start + 1);
++      }
+     } else if (line_num > 0) {
+       GST_WARNING ("end of subtitle unit but no valid start time?!");
+     }
+-- 
+2.50.1
+

meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-base_1.20.7.bb

@@ -20,6 +20,8 @@ SRC_URI = "https://gstreamer.freedesktop.org/src/gst-plugins-base/gst-plugins-ba
            file://CVE-2024-47615-1.patch \
            file://CVE-2024-47615-2.patch \
            file://CVE-2024-47835.patch \
+           file://CVE-2025-47806.patch \
+           file://CVE-2025-47808.patch \
            "
 SRC_URI[sha256sum] = "fde6696a91875095d82c1012b5777c28ba926047ffce08508e12c1d2c66f0057"