ffmpeg: fix CVE-2024-36613

FFmpeg n6.1.1 has a vulnerability in the DXA demuxer of the libavformat library
allowing for an integer overflow, potentially resulting in a denial-of-service
(DoS) condition or other undefined behavior.

(From OE-Core rev: 5661bac10db7e20064c10660c47c361b7d2418ee)

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

2 files changed, 38 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2024-36613.patch b/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2024-36613.patch
new file mode 100644
index 0000000000..0061b7ad98
--- /dev/null
+++ b/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2024-36613.patch
@@ -0,0 +1,37 @@
+From 50d8e4f27398fd5778485a827d7a2817921f8540 Mon Sep 17 00:00:00 2001
+From: Michael Niedermayer <michael@niedermayer.cc>
+Date: Sat, 30 Sep 2023 00:51:29 +0200
+Subject: [PATCH] avformat/dxa: Adjust order of operations around block align
+
+Fixes: 51896/clusterfuzz-testcase-minimized-ffmpeg_dem_DXA_fuzzer-5730576523198464
+Fixes: signed integer overflow: 2147483566 + 82 cannot be represented in type 'int'
+
+Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
+Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
+(cherry picked from commit 50d8e4f27398fd5778485a827d7a2817921f8540)
+Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
+
+CVE: CVE-2024-36613
+
+Upstream-Status: Backport [https://github.com/ffmpeg/ffmpeg/commit/50d8e4f27398fd5778485a827d7a2817921f8540]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ libavformat/dxa.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libavformat/dxa.c b/libavformat/dxa.c
+index 474b852..b4d9d00 100644
+--- a/libavformat/dxa.c
++++ b/libavformat/dxa.c
+@@ -122,7 +122,7 @@ static int dxa_read_header(AVFormatContext *s)
+         if(ast->codecpar->block_align) {
+             if (c->bpc > INT_MAX - ast->codecpar->block_align + 1)
+                 return AVERROR_INVALIDDATA;
+-            c->bpc = ((c->bpc + ast->codecpar->block_align - 1) / ast->codecpar->block_align) * ast->codecpar->block_align;
++            c->bpc = ((c->bpc - 1 + ast->codecpar->block_align) / ast->codecpar->block_align) * ast->codecpar->block_align;
+         }
+         c->bytes_left = fsize;
+         c->wavpos = avio_tell(pb);
+--
+2.40.0
diff --git a/meta/recipes-multimedia/ffmpeg/ffmpeg_6.1.1.bb b/meta/recipes-multimedia/ffmpeg/ffmpeg_6.1.1.bb
index fb3f954904..5e22fd4080 100644
--- a/meta/recipes-multimedia/ffmpeg/ffmpeg_6.1.1.bb
+++ b/meta/recipes-multimedia/ffmpeg/ffmpeg_6.1.1.bb
@@ -41,6 +41,7 @@ SRC_URI = " \
     file://CVE-2024-35367.patch \
     file://CVE-2024-35368.patch \
     file://CVE-2024-35365.patch \
+    file://CVE-2024-36613.patch \
 "
 
 SRC_URI[sha256sum] = "8684f4b00f94b85461884c3719382f1261f0d9eb3d59640a1f4ac0873616f968"