Invalid memory address dereference in Exiv2::StringValueBase::read ( in value.cpp:302)

[fantasy7082]

I'm forwarding a security vulnerability reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=1494780

The file used to reproduce the issue is here:
https://bugzilla.redhat.com/attachment.cgi?id=1329794

Here's a copy of the report:

Liu Zhu 2017-09-22 22:04:33 EDT
Created attachment 1329794 [details]
PoC File

./exiv2 005-invalid-mem
Warning: Directory Image, entry 0x011a has unknown Exif (TIFF) type 64772; setting type size 1.
Error: Upper boundary of data for directory Image, entry 0x011b is out of bounds: Offset = 0x00000030, size = 1073741832, exceeds buffer size by 1073734073 Bytes; truncating the entry
Error: Upper boundary of data for directory Photo, entry 0x9003 is out of bounds: Offset = 0x000001f8, size = 3538992, exceeds buffer size by 3531689 Bytes; truncating the entry
Warning: Directory Nikon3 has an unexpected next pointer; ignored.
ASAN:SIGSEGV

==11802==ERROR: AddressSanitizer: SEGV on unknown address 0x62410000c2c3 (pc 0x7f69ca832cf0 bp 0x7ffc8db8ae20 sp 0x7ffc8db8a5a8 T0)
#0 0x7f69ca832cef (/lib/x86_64-linux-gnu/libc.so.6+0x160cef)
#1 0x7f69cbb125d0 in __asan_memcpy (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x8c5d0)
#2 0x7f69cadd3b06 in void std::__cxx11::basic_string<char, std::char_traits, std::allocator >::_M_construct<char const*>(char const*, char const*, std::forward_iterator_tag) (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x121b06)
#3 0x7f69cadd3c04 in std::__cxx11::basic_string<char, std::char_traits, std::allocator >::basic_string(char const*, unsigned long, std::allocator const&) (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x121c04)
#4 0x7f69cb4a9057 in Exiv2::StringValueBase::read(unsigned char const*, long, Exiv2::ByteOrder) /root/fuzzing/exiv2-trunk/src/value.cpp:302
#5 0x7f69cb498d08 in Exiv2::Internal::TiffReader::readTiffEntry(Exiv2::Internal::TiffEntryBase*) /root/fuzzing/exiv2-trunk/src/tiffvisitor.cpp:1541
#6 0x7f69cb4954be in Exiv2::Internal::TiffReader::visitEntry(Exiv2::Internal::TiffEntry*) /root/fuzzing/exiv2-trunk/src/tiffvisitor.cpp:1204
#7 0x7f69cb46397c in Exiv2::Internal::TiffEntry::doAccept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:896
#8 0x7f69cb463909 in Exiv2::Internal::TiffComponent::accept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:891
#9 0x7f69cb463cc2 in Exiv2::Internal::TiffDirectory::doAccept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:919
#10 0x7f69cb463909 in Exiv2::Internal::TiffComponent::accept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:891
#11 0x7f69cb464351 in Exiv2::Internal::TiffIfdMakernote::doAccept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:949
#12 0x7f69cb463909 in Exiv2::Internal::TiffComponent::accept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:891
#13 0x7f69cb4641bf in Exiv2::Internal::TiffMnEntry::doAccept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:938
#14 0x7f69cb463909 in Exiv2::Internal::TiffComponent::accept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:891
#15 0x7f69cb463cc2 in Exiv2::Internal::TiffDirectory::doAccept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:919
#16 0x7f69cb463909 in Exiv2::Internal::TiffComponent::accept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:891
#17 0x7f69cb46407e in Exiv2::Internal::TiffSubIfd::doAccept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:931
#18 0x7f69cb463909 in Exiv2::Internal::TiffComponent::accept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:891
#19 0x7f69cb463cc2 in Exiv2::Internal::TiffDirectory::doAccept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:919
#20 0x7f69cb463909 in Exiv2::Internal::TiffComponent::accept(Exiv2::Internal::TiffVisitor&) /root/fuzzing/exiv2-trunk/src/tiffcomposite.cpp:891
#21 0x7f69cb47c451 in Exiv2::Internal::TiffParserWorker::parse(unsigned char const*, unsigned int, unsigned int, Exiv2::Internal::TiffHeaderBase*) /root/fuzzing/exiv2-trunk/src/tiffimage.cpp:2011
#22 0x7f69cb47b267 in Exiv2::Internal::TiffParserWorker::decode(Exiv2::ExifData&, Exiv2::IptcData&, Exiv2::XmpData&, unsigned char const*, unsigned int, unsigned int, void (Exiv2::Internal::TiffDecoder::()(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&, unsigned int, Exiv2::Internal::IfdId))(Exiv2::Internal::TiffEntryBase const*), Exiv2::Internal::TiffHeaderBase*) /root/fuzzing/exiv2-trunk/src/tiffimage.cpp:1900
#23 0x7f69cb479a82 in Exiv2::TiffParser::decode(Exiv2::ExifData&, Exiv2::IptcData&, Exiv2::XmpData&, unsigned char const*, unsigned int) /root/fuzzing/exiv2-trunk/src/tiffimage.cpp:266
#24 0x7f69cb37643e in Exiv2::ExifParser::decode(Exiv2::ExifData&, unsigned char const*, unsigned int) /root/fuzzing/exiv2-trunk/src/exif.cpp:629
#25 0x7f69cb3b6030 in Exiv2::JpegBase::readMetadata() /root/fuzzing/exiv2-trunk/src/jpgimage.cpp:386
#26 0x43ab02 in Action::Print::printSummary() /root/fuzzing/exiv2-trunk/src/actions.cpp:289
#27 0x43a1af in Action::Print::run(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&) /root/fuzzing/exiv2-trunk/src/actions.cpp:244
#28 0x422129 in main /root/fuzzing/exiv2-trunk/src/exiv2.cpp:170
#29 0x7f69ca6f282f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#30 0x421af8 in _start (/usr/local/exiv2_ASAN/bin/exiv2+0x421af8)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV ??:0 ??
==11802==ABORTING
[reply] [−] Comment 2 Liu Zhu 2017-09-23 01:15:42 EDT
./exiv2 -V
exiv2 0.26 001a00 (64 bit build)
Copyright (C) 2004-2017 Andreas Huggel.

[D4N]

Fixed by #110

[rhertzog]

FTR this is known as CVE-2017-14859.