https://sourceware.org/bugzilla/show_bug.cgi?id=31058
Bug ID: 31058
Summary: global-buffer-overflow exists in the function
ebl_machine_flag_name in eblmachineflagname.c
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tools
Assignee: unassigned at sourceware dot org
Reporter: jyxu at seu dot edu.cn
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
Created attachment 15216
--> https://sourceware.org/bugzilla/attachment.cgi?id=15216&action=edit
poc
System info
Ubuntu x86_64, clang 12.0
version: readelf (elfutils) 0.190
Command line
./readelf -a poc
Poc
poc:https://github.com/SEU-SSL/Poc/blob/main/elfutils/id_000121%2Csig_08%2Csrc_002748%2B003088%2Cop_splice%2Crep_128（Alternatively,
download it in the attachment.）
AddressSanitizer output
==3674715==ERROR: AddressSanitizer: global-buffer-overflow on address
0x0000005fe002 at pc 0x000000430d96 bp 0x7ffc65cae250 sp 0x7ffc65cada10
READ of size 1 at 0x0000005fe002 thread T0
#0 0x430d95 in strlen (/src/elfutils-0.190/src/readelf+0x430d95)
#1 0x53f152 in ebl_machine_flag_name
/src/elfutils-0.190/libebl/eblmachineflagname.c:73:17
#2 0x4cf3ad in print_ehdr /src/elfutils-0.190/src/readelf.c:1181:4
#3 0x4cf3ad in process_elf_file /src/elfutils-0.190/src/readelf.c:1050:5
#4 0x4cddf4 in process_dwflmod /src/elfutils-0.190/src/readelf.c:840:3
#5 0x7fba8f0d800d in dwfl_getmodules
/src/elfutils-0.190/libdwfl/dwfl_getmodules.c:86:16
#6 0x4cb8e1 in process_file /src/elfutils-0.190/src/readelf.c:948:7
#7 0x4cad48 in main /src/elfutils-0.190/src/readelf.c:417:7
#8 0x7fba8ebac082 in __libc_start_main
/build/glibc-BHL3KM/glibc-2.31/csu/../csu/libc-start.c:308:16
#9 0x41ec2d in _start (/src/elfutils-0.190/src/readelf+0x41ec2d)
0x0000005fe002 is located 30 bytes to the left of global variable '<string
literal>' defined in 'arm_machineflagname.c:59:11' (0x5fe020) of size 34
'<string literal>' is ascii string 'dynamic symbols use segment index'
0x0000005fe002 is located 28 bytes to the right of global variable 'vername'
defined in 'arm_machineflagname.c:42:25' (0x5fdfa0) of size 70
SUMMARY: AddressSanitizer: global-buffer-overflow
(/src/elfutils-0.190/src/readelf+0x430d95) in strlen
Shadow bytes around the buggy address:
0x0000800b7bb0: f9 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 f9 f9 f9 f9
0x0000800b7bc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800b7bd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 f9
0x0000800b7be0: f9 f9 f9 f9 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800b7bf0: 00 00 00 00 00 00 00 00 00 00 00 00 06 f9 f9 f9
=>0x0000800b7c00:[f9]f9 f9 f9 00 00 00 00 02 f9 f9 f9 f9 f9 f9 f9
0x0000800b7c10: 00 00 00 07 f9 f9 f9 f9 00 00 05 f9 f9 f9 f9 f9
0x0000800b7c20: 00 07 f9 f9 f9 f9 f9 f9 00 07 f9 f9 f9 f9 f9 f9
0x0000800b7c30: 04 f9 f9 f9 f9 f9 f9 f9 04 f9 f9 f9 f9 f9 f9 f9
0x0000800b7c40: 00 00 05 f9 f9 f9 f9 f9 00 05 f9 f9 f9 f9 f9 f9
0x0000800b7c50: 00 00 f9 f9 f9 f9 f9 f9 00 00 05 f9 f9 f9 f9 f9
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
Shadow gap: cc
==3674715==ABORTING
--
You are receiving this mail because:
You are on the CC list for the bug.
