Bug 1803296

Summary: Heap out-of-bound read in process_COM of jhead 3.04
Product: [Fedora] Fedora EPEL Reporter: puzzor <puzzorsj>
Component: jheadAssignee: Adrian Reber <adrian>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: unspecified    
Version: epel8CC: adrian
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 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 and analysis none

Description puzzor 2020-02-15 02:44:27 UTC 
Created attachment 1663208 [details]
PoC and analysis

Description of problem:


Version-Release number of selected component (if applicable):
3.04

How reproducible:
stable

Steps to Reproduce:
1.git clone the code from https://salsa.debian.org/debian/jhead/, or from the upstream.

2.compile the code with ASAN
3.run ./jhead poc

Actual results:
=================================================================
==25565==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60400000e000 at pc 0x000000407465 bp 0x7ffd83a3de00 sp 0x7ffd83a3ddf0
READ of size 1 at 0x60400000e000 thread T0
    #0 0x407464 in process_COM /home/ubuntu/jhead-3.04/jpgfile.c:51
    #1 0x407fce in ReadJpegSections /home/ubuntu/jhead-3.04/jpgfile.c:241
    #2 0x408210 in ReadJpegFile /home/ubuntu/jhead-3.04/jpgfile.c:379
    #3 0x404e66 in ProcessFile /home/ubuntu/jhead-3.04/jhead.c:905
    #4 0x4025d5 in main /home/ubuntu/jhead-3.04/jhead.c:1756
    #5 0x7f01c329082f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #6 0x403b08 in _start (/home/ubuntu/jhead-3.04/jhead+0x403b08)

0x60400000e000 is located 0 bytes to the right of 48-byte region [0x60400000dfd0,0x60400000e000)
allocated by thread T0 here:
    #0 0x7f01c39db602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x407634 in ReadJpegSections /home/ubuntu/jhead-3.04/jpgfile.c:173

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/ubuntu/jhead-3.04/jpgfile.c:51 process_COM
Shadow bytes around the buggy address:
  0x0c087fff9bb0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9bc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9bd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9be0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9bf0: fa fa fa fa fa fa fa fa fa fa 00 00 00 00 00 00
=>0x0c087fff9c00:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9c10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9c20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9c30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9c40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff9c50: 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
==25565==ABORTING


Expected results:


Additional info:
in ``jpgqguess.c`` function ``process_DQT`` line 109, when ``a`` equals ``length-1``, ``Data[a++]`` will cause an OOB read.


We have reported to the upstream, but the upstream is not active responsive, so we post the bug here