[Bug libelf/23787] New: Invalid Address Deference problem in function elf_end in libelf the latest elfutils-0.174

wcventure at 126 dot com sourceware-bugzilla@sourceware.org
Wed Oct 17 12:01:00 GMT 2018


https://sourceware.org/bugzilla/show_bug.cgi?id=23787

            Bug ID: 23787
           Summary: Invalid Address Deference problem in function elf_end
                    in libelf the latest elfutils-0.174
           Product: elfutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libelf
          Assignee: unassigned at sourceware dot org
          Reporter: wcventure at 126 dot com
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

Created attachment 11338
  --> https://sourceware.org/bugzilla/attachment.cgi?id=11338&action=edit
POC1

Hi,

Our fuzzer found an Invalid Address Deference problem in function elf_end in
libelf the latest elfutils-0.174 code base. I have confirmed them with Address
Sanitizer, too.

The function elf_end is called by size.c. Here are the POC files. Please use "
./eu-size $POC " to reproduce this bug. 

The ASAN dumps the stack trace as follows:
ASAN:DEADLYSIGNAL
=================================================================
==21938==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc
0x7f1a0efb3cd6 bp 0x7ffd04b5dc40 sp 0x7ffd04b5db50 T0)
==21938==The signal is caused by a READ memory access.
==21938==Hint: address points to the zero page.
    #0 0x7f1a0efb3cd5 in elf_end (/usr/lib/x86_64-linux-gnu/libelf.so.1+0x4cd5)
    #1 0x405aa2 in handle_ar
/media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/size.c:373
    #2 0x401c7a in process_file
/media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/size.c:294
    #3 0x401c7a in main
/media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/src/size.c:186
    #4 0x7f1a0ec0582f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #5 0x4029f8 in _start
(/media/hjwang/01D3344861A8D2E0/wcventure/Project/elfutils/build/bin/eu-size+0x4029f8)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/usr/lib/x86_64-linux-gnu/libelf.so.1+0x4cd5)
in elf_end
==21938==ABORTING
Aborted

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