ffmpeg: fix CVE-2023-51793

Buffer Overflow vulnerability in Ffmpeg v.N113007-g8d24a28d06 allows a local
attacker to execute arbitrary code via the libavutil/imgutils.c:353:9 in image_copy_plane.

(From OE-Core rev: be875832526636638a034680f837241c16e2b26d)

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 68 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2023-51793.patch b/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2023-51793.patch
new file mode 100644
index 0000000000..71eeb92422
--- /dev/null
+++ b/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2023-51793.patch
@@ -0,0 +1,67 @@
+From 0ecc1f0e48930723d7a467761b66850811c23e62 Mon Sep 17 00:00:00 2001
+From: Michael Niedermayer <michael@niedermayer.cc>
+Date: Fri, 22 Dec 2023 12:31:35 +0100
+Subject: [PATCH 2/5] avfilter/vf_weave: Fix odd height handling
+
+Fixes: out of array access
+Fixes: tickets/10743/poc10ffmpeg
+
+Found-by: Zeng Yunxiang and Li Zeyuan
+Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
+
+CVE: CVE-2023-51793
+
+Upstream-Status: Backport [https://github.com/FFmpeg/FFmpeg/commit/0ecc1f0e48930723d7a467761b66850811c23e62]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ libavfilter/vf_weave.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/libavfilter/vf_weave.c b/libavfilter/vf_weave.c
+index 2bd3994..de9f79c 100644
+--- a/libavfilter/vf_weave.c
++++ b/libavfilter/vf_weave.c
+@@ -30,6 +30,7 @@ typedef struct WeaveContext {
+     int double_weave;
+     int nb_planes;
+     int planeheight[4];
++    int outheight[4];
+     int linesize[4];
+
+     AVFrame *prev;
+@@ -79,6 +80,9 @@ static int config_props_output(AVFilterLink *outlink)
+     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+     s->planeheight[0] = s->planeheight[3] = inlink->h;
+
++    s->outheight[1] = s->outheight[2] = AV_CEIL_RSHIFT(2*inlink->h, desc->log2_chroma_h);
++    s->outheight[0] = s->outheight[3] = 2*inlink->h;
++
+     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
+
+     return 0;
+@@ -104,19 +108,20 @@ static int weave_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+         const int height = s->planeheight[i];
+         const int start = (height * jobnr) / nb_jobs;
+         const int end = (height * (jobnr+1)) / nb_jobs;
++        const int compensation = 2*end > s->outheight[i];
+
+         av_image_copy_plane(out->data[i] + out->linesize[i] * field1 +
+                             out->linesize[i] * start * 2,
+                             out->linesize[i] * 2,
+                             in->data[i] + start * in->linesize[i],
+                             in->linesize[i],
+-                            s->linesize[i], end - start);
++                            s->linesize[i], end - start - compensation * field1);
+         av_image_copy_plane(out->data[i] + out->linesize[i] * field2 +
+                             out->linesize[i] * start * 2,
+                             out->linesize[i] * 2,
+                             s->prev->data[i] + start * s->prev->linesize[i],
+                             s->prev->linesize[i],
+-                            s->linesize[i], end - start);
++                            s->linesize[i], end - start - compensation * field2);
+     }
+
+     return 0;
+--
+2.40.0
diff --git a/meta/recipes-multimedia/ffmpeg/ffmpeg_5.0.1.bb b/meta/recipes-multimedia/ffmpeg/ffmpeg_5.0.1.bb
index 40963d1254..9a99951f91 100644
--- a/meta/recipes-multimedia/ffmpeg/ffmpeg_5.0.1.bb
+++ b/meta/recipes-multimedia/ffmpeg/ffmpeg_5.0.1.bb
@@ -30,6 +30,7 @@ SRC_URI = "https://www.ffmpeg.org/releases/${BP}.tar.xz \
            file://0001-avformat-nutdec-Add-check-for-avformat_new_stream.patch \
            file://CVE-2022-48434.patch \
            file://CVE-2024-32230.patch \
+           file://CVE-2023-51793.patch \
           "
 
 SRC_URI[sha256sum] = "ef2efae259ce80a240de48ec85ecb062cecca26e4352ffb3fda562c21a93007b"