72 lines
2.6 KiB
Diff
72 lines
2.6 KiB
Diff
From d06fa15d1c113edea0d6760ea19af8e8d0af0d94 Mon Sep 17 00:00:00 2001
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From: James Zern <jzern@google.com>
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Date: Fri, 7 Jun 2019 15:06:29 -0700
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Subject: [PATCH 4/4] CVE-2019-2126: update libwebm to
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libwebm-1.0.0.27-361-g81de00c
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81de00c Check there is only one settings per ContentCompression
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5623013 Fixes a double free in ContentEncoding
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93b2ba0 mkvparser: quiet static analysis warnings
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Change-Id: Ieaa562ef2f10075381bd856388e6b29f97ca2746
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---
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third_party/libwebm/README.libvpx | 2 +-
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third_party/libwebm/mkvparser/mkvparser.cc | 9 +++++++++
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2 files changed, 10 insertions(+), 1 deletion(-)
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diff --git a/third_party/libwebm/README.libvpx b/third_party/libwebm/README.libvpx
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index 16f17513e..714f5d0eb 100644
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--- a/third_party/libwebm/README.libvpx
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+++ b/third_party/libwebm/README.libvpx
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@@ -1,5 +1,5 @@
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URL: https://chromium.googlesource.com/webm/libwebm
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-Version: dbf1d1089756e7cb5b1a04d6752310ef35912347
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+Version: 81de00c43ea3c087b48a8c20337db7531b9f7612
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License: BSD
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License File: LICENSE.txt
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diff --git a/third_party/libwebm/mkvparser/mkvparser.cc b/third_party/libwebm/mkvparser/mkvparser.cc
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index dcb969dcf..ace65bd59 100644
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--- a/third_party/libwebm/mkvparser/mkvparser.cc
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+++ b/third_party/libwebm/mkvparser/mkvparser.cc
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@@ -4230,6 +4230,7 @@ long ContentEncoding::ParseContentEncodingEntry(long long start, long long size,
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new (std::nothrow) ContentEncryption*[encryption_count];
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if (!encryption_entries_) {
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delete[] compression_entries_;
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+ compression_entries_ = NULL;
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return -1;
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}
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encryption_entries_end_ = encryption_entries_;
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@@ -4261,6 +4262,7 @@ long ContentEncoding::ParseContentEncodingEntry(long long start, long long size,
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delete compression;
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return status;
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}
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+ assert(compression_count > 0);
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*compression_entries_end_++ = compression;
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} else if (id == libwebm::kMkvContentEncryption) {
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ContentEncryption* const encryption =
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@@ -4273,6 +4275,7 @@ long ContentEncoding::ParseContentEncodingEntry(long long start, long long size,
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delete encryption;
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return status;
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}
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+ assert(encryption_count > 0);
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*encryption_entries_end_++ = encryption;
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}
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@@ -4325,6 +4328,12 @@ long ContentEncoding::ParseCompressionEntry(long long start, long long size,
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return status;
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}
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+ // There should be only one settings element per content compression.
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+ if (compression->settings != NULL) {
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+ delete[] buf;
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+ return E_FILE_FORMAT_INVALID;
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+ }
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+
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compression->settings = buf;
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compression->settings_len = buflen;
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}
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--
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2.25.1
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