From: Li Wang <li.w...@windriver.com> In append_to_verify_fifo_interleaved_ of stream_encoder.c, there is a possible out of bounds write due to a missing bounds check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-174302683
References: https://nvd.nist.gov/vuln/detail/CVE-2021-0561 Upstream patches: https://github.com/xiph/flac/commit/e1575e4a7c5157cbf4e4a16dbd39b74f7174c7be Signed-off-by: Li Wang <li.w...@windriver.com> Signed-off-by: Joe Slater <joe.sla...@windriver.com> Signed-off-by: Anuj Mittal <anuj.mit...@intel.com> --- .../flac/flac/CVE-2021-0561.patch | 41 +++++++++++++++++++ meta/recipes-multimedia/flac/flac_1.3.3.bb | 1 + 2 files changed, 42 insertions(+) create mode 100644 meta/recipes-multimedia/flac/flac/CVE-2021-0561.patch diff --git a/meta/recipes-multimedia/flac/flac/CVE-2021-0561.patch b/meta/recipes-multimedia/flac/flac/CVE-2021-0561.patch new file mode 100644 index 0000000000..b48663ae42 --- /dev/null +++ b/meta/recipes-multimedia/flac/flac/CVE-2021-0561.patch @@ -0,0 +1,41 @@ +From e1575e4a7c5157cbf4e4a16dbd39b74f7174c7be Mon Sep 17 00:00:00 2001 +From: Neelkamal Semwal <neelkamal.sem...@ittiam.com> +Date: Fri, 18 Dec 2020 22:28:36 +0530 +Subject: [PATCH] libFlac: Exit at EOS in verify mode + +When verify mode is enabled, once decoder flags end of stream, +encode processing is considered complete. + +CVE-2021-0561 + +Signed-off-by: Ralph Giles <gi...@thaumas.net> + +Upstream-Status: Backport +CVE: CVE-2021-0561 + +Reference to upstream patch: +https://github.com/xiph/flac/commit/e1575e4a7c5157cbf4e4a16dbd39b74f7174c7be + +Signed-off-by: Li Wang <li.w...@windriver.com> +--- + src/libFLAC/stream_encoder.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +diff --git a/src/libFLAC/stream_encoder.c b/src/libFLAC/stream_encoder.c +index 74387ec..8bb0ef3 100644 +--- a/src/libFLAC/stream_encoder.c ++++ b/src/libFLAC/stream_encoder.c +@@ -2610,7 +2610,9 @@ FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, uint32_t samples, FLAC + encoder->private_->verify.needs_magic_hack = true; + } + else { +- if(!FLAC__stream_decoder_process_single(encoder->private_->verify.decoder)) { ++ if(!FLAC__stream_decoder_process_single(encoder->private_->verify.decoder) ++ || (!is_last_block ++ && (FLAC__stream_encoder_get_verify_decoder_state(encoder) == FLAC__STREAM_DECODER_END_OF_STREAM))) { + FLAC__bitwriter_release_buffer(encoder->private_->frame); + FLAC__bitwriter_clear(encoder->private_->frame); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA) +-- +2.23.0 + diff --git a/meta/recipes-multimedia/flac/flac_1.3.3.bb b/meta/recipes-multimedia/flac/flac_1.3.3.bb index cb6692aedf..d3c352cc44 100644 --- a/meta/recipes-multimedia/flac/flac_1.3.3.bb +++ b/meta/recipes-multimedia/flac/flac_1.3.3.bb @@ -15,6 +15,7 @@ LIC_FILES_CHKSUM = "file://COPYING.FDL;md5=ad1419ecc56e060eccf8184a87c4285f \ DEPENDS = "libogg" SRC_URI = "http://downloads.xiph.org/releases/flac/${BP}.tar.xz \ + file://CVE-2021-0561.patch \ " SRC_URI[md5sum] = "26703ed2858c1fc9ffc05136d13daa69" -- 2.35.1
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