https://sourceware.org/bugzilla/show_bug.cgi?id=25069
Bug ID: 25069
Summary: AddressSanitizer: heap-buffer-overflow at
libdwelf/dwelf_strtab.c:284
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libelf
Assignee: unassigned at sourceware dot org
Reporter: leftcopy.chx at gmail dot com
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Created attachment 12024
--> https://sourceware.org/bugzilla/attachment.cgi?id=12024&action=edit
pocs
When running `eu-unstrip hbo_libelf/hbo__dwelf_strtab.c:284_1
hbo_libelf/stripped -o /dev/null` (compiled with ASAN), it may report the error
message, which results from a heap-buffer-overflow inside libelf (relevant file
attached):
=
==18249==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x62001f75 at pc 0x76e6b66e bp 0x7fff48b0 sp 0x7fff4058
READ of size 20 at 0x62001f75 thread T0
#0 0x76e6b66d (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x5166d)
#1 0x768b080a in dwelf_strtab_add
/home/hongxu/FOT/Targets/elfutils/eu-asan/libdwelf/dwelf_strtab.c:284
#2 0x55569394 in copy_elided_sections
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:1845
#3 0x5556bea1 in handle_file
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:2162
#4 0x5556c760 in handle_explicit_files
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:2227
#5 0x5556f1f6 in main
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:2562
#6 0x763b2b96 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
#7 0x9a89 in _start
(/home/hongxu/FOT/Targets/elfutils/eu-asan/install/bin/eu-unstrip+0x5a89)
0x62001f75 is located 0 bytes to the right of 3829-byte region
[0x62001080,0x62001f75)
allocated by thread T0 here:
#0 0x76ef8b50 in __interceptor_malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb50)
#1 0x76be8287 in __libelf_set_rawdata_wrlock
/home/hongxu/FOT/Targets/elfutils/eu-asan/libelf/elf_getdata.c:332
#2 0x76be8f06 in __elf_getdata_rdlock
/home/hongxu/FOT/Targets/elfutils/eu-asan/libelf/elf_getdata.c:535
#3 0x76be8fb6 in elf_getdata
/home/hongxu/FOT/Targets/elfutils/eu-asan/libelf/elf_getdata.c:562
#4 0xf7d0 in collect_symbols
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:838
#5 0x55568b94 in copy_elided_sections
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:1783
#6 0x5556bea1 in handle_file
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:2162
#7 0x5556c760 in handle_explicit_files
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:2227
#8 0x5556f1f6 in main
/home/hongxu/FOT/Targets/elfutils/eu-asan/src/unstrip.c:2562
#9 0x763b2b96 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
SUMMARY: AddressSanitizer: heap-buffer-overflow
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0x5166d)
Shadow bytes around the buggy address:
0x0c407fff8390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c407fff83a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c407fff83b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c407fff83c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c407fff83d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c407fff83e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[05]fa
0x0c407fff83f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff8400: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff8410: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff8420: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c407fff8430: 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
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
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
Left alloca redzone: ca
Right alloca redzone:cb
==18249==ABORTING
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