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-rw-r--r--community/exiv2/CVE-2019-20421.patch117
1 files changed, 117 insertions, 0 deletions
diff --git a/community/exiv2/CVE-2019-20421.patch b/community/exiv2/CVE-2019-20421.patch
new file mode 100644
index 0000000000..76b88a1a75
--- /dev/null
+++ b/community/exiv2/CVE-2019-20421.patch
@@ -0,0 +1,117 @@
+From 1b917c3f7dd86336a9f6fda4456422c419dfe88c Mon Sep 17 00:00:00 2001
+From: clanmills <robin@clanmills.com>
+Date: Tue, 1 Oct 2019 17:39:44 +0100
+Subject: [PATCH] Fix #1011 fix_1011_jp2_readmetadata_loop
+
+---
+ src/jp2image.cpp | 25 +++++++++++++++----
+ tests/bugfixes/github/test_CVE_2017_17725.py | 4 +--
+ tests/bugfixes/github/test_issue_1011.py | 13 ++++++++++
+ 4 files changed, 35 insertions(+), 7 deletions(-)
+ create mode 100755 test/data/Jp2Image_readMetadata_loop.poc
+ create mode 100644 tests/bugfixes/github/test_issue_1011.py
+
+diff --git a/src/jp2image.cpp b/src/jp2image.cpp
+index d5cd1340a..0de088d62 100644
+--- a/src/jp2image.cpp
++++ b/src/jp2image.cpp
+@@ -18,10 +18,6 @@
+ * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
+ */
+
+-/*
+- File: jp2image.cpp
+-*/
+-
+ // *****************************************************************************
+
+ // included header files
+@@ -197,6 +193,16 @@ namespace Exiv2
+ return result;
+ }
+
++static void boxes_check(size_t b,size_t m)
++{
++ if ( b > m ) {
++#ifdef EXIV2_DEBUG_MESSAGES
++ std::cout << "Exiv2::Jp2Image::readMetadata box maximum exceeded" << std::endl;
++#endif
++ throw Error(kerCorruptedMetadata);
++ }
++}
++
+ void Jp2Image::readMetadata()
+ {
+ #ifdef EXIV2_DEBUG_MESSAGES
+@@ -219,9 +225,12 @@ namespace Exiv2
+ Jp2BoxHeader subBox = {0,0};
+ Jp2ImageHeaderBox ihdr = {0,0,0,0,0,0,0,0};
+ Jp2UuidBox uuid = {{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
++ size_t boxes = 0 ;
++ size_t boxem = 1000 ; // boxes max
+
+ while (io_->read((byte*)&box, sizeof(box)) == sizeof(box))
+ {
++ boxes_check(boxes++,boxem );
+ position = io_->tell();
+ box.length = getLong((byte*)&box.length, bigEndian);
+ box.type = getLong((byte*)&box.type, bigEndian);
+@@ -251,8 +260,12 @@ namespace Exiv2
+
+ while (io_->read((byte*)&subBox, sizeof(subBox)) == sizeof(subBox) && subBox.length )
+ {
++ boxes_check(boxes++, boxem) ;
+ subBox.length = getLong((byte*)&subBox.length, bigEndian);
+ subBox.type = getLong((byte*)&subBox.type, bigEndian);
++ if (subBox.length > io_->size() ) {
++ throw Error(kerCorruptedMetadata);
++ }
+ #ifdef EXIV2_DEBUG_MESSAGES
+ std::cout << "Exiv2::Jp2Image::readMetadata: "
+ << "subBox = " << toAscii(subBox.type) << " length = " << subBox.length << std::endl;
+@@ -308,7 +321,9 @@ namespace Exiv2
+ }
+
+ io_->seek(restore,BasicIo::beg);
+- io_->seek(subBox.length, Exiv2::BasicIo::cur);
++ if ( io_->seek(subBox.length, Exiv2::BasicIo::cur) != 0 ) {
++ throw Error(kerCorruptedMetadata);
++ }
+ restore = io_->tell();
+ }
+ break;
+
+diff --git a/tests/bugfixes/github/test_CVE_2017_17725.py b/tests/bugfixes/github/test_CVE_2017_17725.py
+index 1127b9806..670a75d8d 100644
+--- a/tests/bugfixes/github/test_CVE_2017_17725.py
++++ b/tests/bugfixes/github/test_CVE_2017_17725.py
+@@ -11,7 +11,7 @@ class TestCvePoC(metaclass=system_tests.CaseMeta):
+ filename = "$data_path/poc_2017-12-12_issue188"
+ commands = ["$exiv2 " + filename]
+ stdout = [""]
+- stderr = ["""$exiv2_overflow_exception_message """ + filename + """:
+-$addition_overflow_message
++ stderr = ["""$exiv2_exception_message """ + filename + """:
++$kerCorruptedMetadata
+ """]
+ retval = [1]
+diff --git a/tests/bugfixes/github/test_issue_1011.py b/tests/bugfixes/github/test_issue_1011.py
+new file mode 100644
+index 000000000..415861188
+--- /dev/null
++++ b/tests/bugfixes/github/test_issue_1011.py
+@@ -0,0 +1,13 @@
++# -*- coding: utf-8 -*-
++
++from system_tests import CaseMeta, path
++
++class Test_issue_1011(metaclass=CaseMeta):
++
++ filename = path("$data_path/Jp2Image_readMetadata_loop.poc")
++ commands = ["$exiv2 " + filename]
++ stdout = [""]
++ stderr = ["""$exiv2_exception_message """ + filename + """:
++$kerCorruptedMetadata
++"""]
++ retval = [1]
+\ No newline at end of file