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List:       binutils-bugs
Subject:    [Bug binutils/29946] New: Memroy leak in objdump
From:       "pdeng21 at m dot fudan.edu.cn" <sourceware-bugzilla () sourceware ! org>
Date:       2022-12-28 2:56:45
Message-ID: bug-29946-70 () http ! sourceware ! org/bugzilla/
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https://sourceware.org/bugzilla/show_bug.cgi?id=29946

            Bug ID: 29946
           Summary: Memroy leak in objdump
           Product: binutils
           Version: 2.40 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: pdeng21 at m dot fudan.edu.cn
  Target Milestone: ---

Created attachment 14540
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14540&action=edit
PoC to replay the vulnerability

#Summary
There is a memory leak vulnerability in objdump, which can be triggered by a
craft elf file.

#Verification
git clone git://sourceware.org/git/binutils-gdb.git
CC="clang -fsanitize=address" CXX="clang++ -fsanitize=address" ./configure
--disable-shared && make -j$(nproc)
./binutils/objdump -S poc

#ASAN
./objdump: poc: no group info for section '.got.plt'

Section '.debug_info' has an invalid size: 0.
./objdump: Warning: .note.gnu.build-id data size is too big

poc:     file format elf64-little

./objdump: poc: attempt to load strings from a non-string section (number 19)
./objdump: poc: .gnu.version_r invalid entry
./objdump: poc: bad value

=================================================================
==20184==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 112 byte(s) in 1 object(s) allocated from:
    #0 0x4942ed in malloc (/binutils-gdb/binutils/objdump+0x4942ed)
    #1 0x841388 in xmalloc /binutils-gdb/libiberty/./xmalloc.c:149:12
    #2 0x4c6ec0 in display_object_bfd /binutils-gdb/binutils/./objdump.c
    #3 0x4c6ec0 in display_any_bfd /binutils-gdb/binutils/./objdump.c:5825:5
    #4 0x4c5664 in display_file /binutils-gdb/binutils/./objdump.c:5846:3
    #5 0x4c5664 in main /binutils-gdb/binutils/./objdump.c:6254:6
    #6 0x7ff5e6aa5c86 in __libc_start_main
/build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310

SUMMARY: AddressSanitizer: 112 byte(s) leaked in 1 allocation(s).

#Envieonment
Ubuntu 18.04
clang 10.0.0

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