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Bug 1494778

Summary: It is a heap-buffer-overflow in Exiv2::us2Data (types.cpp:346)
Product: Red Hat Enterprise Linux 7 Reporter: Liu Zhu <fantasy7082>
Component: exiv2Assignee: Jan Grulich <jgrulich>
Status: CLOSED ERRATA QA Contact: Desktop QE <desktop-qa-list>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 7.5-AltCC: carnil, dan.cermak
Target Milestone: rcKeywords: Security
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-08-06 12:46:58 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
PoC File none

Description Liu Zhu 2017-09-23 01:52:26 UTC 
Created attachment 1329793 [details]
PoC File

# ./exiv2 004-heap-buffer-over 
invalid type value detected in Image::printIFDStructure:  250
Error: Offset of directory Image, entry 0x00fe is out of bounds: Offset = 0x00000000; truncating the entry
Warning: Directory Image, entry 0xfa00 has unknown Exif (TIFF) type 250; setting type size 1.
Error: Offset of directory Image, entry 0xfa00 is out of bounds: Offset = 0x30000184; truncating the entry
Error: Directory Photo with 8224 entries considered invalid; not read.
=================================================================
==31594==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62100001661c at pc 0x7f684e7c8288 bp 0x7ffc142fd380 sp 0x7ffc142fd370
WRITE of size 1 at 0x62100001661c thread T0
    #0 0x7f684e7c8287 in Exiv2::us2Data(unsigned char*, unsigned short, Exiv2::ByteOrder) /root/fuzzing/exiv2-trunk/src/types.cpp:346
    #1 0x7f684e66e268 in long Exiv2::toData<unsigned short>(unsigned char*, unsigned short, Exiv2::ByteOrder) /root/fuzzing/exiv2-trunk/include/exiv2/value.hpp:1450
    #2 0x7f684e67b3b7 in Exiv2::ValueType<unsigned short>::copy(unsigned char*, Exiv2::ByteOrder) const /root/fuzzing/exiv2-trunk/include/exiv2/value.hpp:1612
    #3 0x7f684e698aa4 in Exiv2::Exifdatum::copy(unsigned char*, Exiv2::ByteOrder) const /root/fuzzing/exiv2-trunk/src/exif.cpp:362
    #4 0x7f684e79deff in Exiv2::TiffImage::readMetadata() /root/fuzzing/exiv2-trunk/src/tiffimage.cpp:204
    #5 0x43ab02 in Action::Print::printSummary() /root/fuzzing/exiv2-trunk/src/actions.cpp:289
    #6 0x43a1af in Action::Print::run(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /root/fuzzing/exiv2-trunk/src/actions.cpp:244
    #7 0x422129 in main /root/fuzzing/exiv2-trunk/src/exiv2.cpp:170
    #8 0x7f684da1782f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #9 0x421af8 in _start (/usr/local/exiv2_ASAN/bin/exiv2+0x421af8)

0x62100001661c is located 0 bytes to the right of 4380-byte region [0x621000015500,0x62100001661c)
allocated by thread T0 here:
    #0 0x7f684ee446b2 in operator new[](unsigned long) (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x996b2)
    #1 0x7f684e7c6695 in Exiv2::DataBuf::alloc(long) /root/fuzzing/exiv2-trunk/src/types.cpp:158
    #2 0x7f684e79de62 in Exiv2::TiffImage::readMetadata() /root/fuzzing/exiv2-trunk/src/tiffimage.cpp:203
    #3 0x43ab02 in Action::Print::printSummary() /root/fuzzing/exiv2-trunk/src/actions.cpp:289
    #4 0x43a1af in Action::Print::run(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /root/fuzzing/exiv2-trunk/src/actions.cpp:244
    #5 0x422129 in main /root/fuzzing/exiv2-trunk/src/exiv2.cpp:170
    #6 0x7f684da1782f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: heap-buffer-overflow /root/fuzzing/exiv2-trunk/src/types.cpp:346 Exiv2::us2Data(unsigned char*, unsigned short, Exiv2::ByteOrder)
Shadow bytes around the buggy address:
  0x0c427fffac70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c427fffac80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c427fffac90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c427fffaca0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c427fffacb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c427fffacc0: 00 00 00[04]fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffacd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427ffface0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffacf0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffad00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffad10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
==31594==ABORTING
Comment 2 Liu Zhu 2017-09-23 05:15:36 UTC 
./exiv2 -V
exiv2 0.26 001a00 (64 bit build)
Copyright (C) 2004-2017 Andreas Huggel.
Comment 3 Salvatore Bonaccorso 2017-09-28 11:58:24 UTC 
This was assigned CVE-2017-14865.

Can you please report the issue upstream?
Comment 4 Agostino Sarubbo 2017-09-29 14:44:18 UTC 
Is there a reason why you are fuzzing the trunk/version of exiv2 and you are reporting it to redhat instead of the upstream project?
Comment 5 Dan Čermák 2017-10-20 21:44:28 UTC 
The upstream issue is https://github.com/Exiv2/exiv2/issues/134.
Comment 7 Jan Grulich 2019-01-28 16:08:18 UTC 
Fixed with exiv2-0.27.0-1.el7_6.
Comment 11 errata-xmlrpc 2019-08-06 12:46:58 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:2101