https://sourceware.org/bugzilla/show_bug.cgi?id=33022
Bug ID: 33022
Summary: Heap Buffer Overflow in nm with liblto_plugin.so
During strncmp
Product: binutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: xdcao.cs at gmail dot com
Target Milestone: ---
Summary
Heap Buffer Overflow in nm with liblto_plugin.so During strncmp
Environment
GNU Binutils version: 2.44.50 & master
OS: Ubuntu 22.04.5 LTS
Steps to reproduce
# export CFLAGS="-g -O0 -fno-inline -fno-lto -fsanitize=address"
# export CXXFLAGS="-g -O0 -fno-inline -fno-lto -fsanitize=address"
# ./configure --disable-werror --enable-targets=all --enable-gold[=yes]
# make -j64 & make install
root@46b925a575de:# ./nm --plugin /usr/lib/bfd-plugins/liblto_plugin.so POC
=================================================================
==1983516==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6060000001d2 at pc 0x00000043268d bp 0x7ffd3f3fd1e0 sp 0x7ffd3f3fc980
READ of size 2 at 0x6060000001d2 thread T0
#0 0x43268c in strncmp
(/workspace/new-test/fuzzdir/fz-binutils/fz-nm/nm+0x43268c)
#1 0x7f89af140b21 (/usr/lib/bfd-plugins/liblto_plugin.so+0xeb21)
#2 0x7f89af14087e (/usr/lib/bfd-plugins/liblto_plugin.so+0xe87e)
#3 0x7f89af13fe90 (/usr/lib/bfd-plugins/liblto_plugin.so+0xde90)
#4 0x7ef82e in try_claim
/root/this-program/binutils-gdb/build/bfd/../../bfd/plugin.c:497:4
#5 0x7ee72c in try_load_plugin
/root/this-program/binutils-gdb/build/bfd/../../bfd/plugin.c:608:8
#6 0x7ede8a in load_plugin
/root/this-program/binutils-gdb/build/bfd/../../bfd/plugin.c:734:12
#7 0x7ed067 in bfd_plugin_object_p
/root/this-program/binutils-gdb/build/bfd/../../bfd/plugin.c:761:53
#8 0x5017e2 in bfd_check_format_matches
/root/this-program/binutils-gdb/build/bfd/../../bfd/format.c:497:17
#9 0x4cd5e8 in display_file
/root/this-program/binutils-gdb/build/binutils/../../binutils/nm.c:1663:12
#10 0x4cc5c1 in main
/root/this-program/binutils-gdb/build/binutils/../../binutils/nm.c:2181:12
#11 0x7f89b1e3bd8f in __libc_start_call_main
csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#12 0x7f89b1e3be3f in __libc_start_main csu/../csu/libc-start.c:392:3
#13 0x41f5b4 in _start
(/workspace/new-test/fuzzdir/fz-binutils/fz-nm/nm+0x41f5b4)
0x6060000001d2 is located 0 bytes to the right of 50-byte region
[0x6060000001a0,0x6060000001d2)
allocated by thread T0 here:
#0 0x49a47d in malloc
(/workspace/new-test/fuzzdir/fz-binutils/fz-nm/nm+0x49a47d)
#1 0x7f89af13c18c in xmalloc (/usr/lib/bfd-plugins/liblto_plugin.so+0xa18c)
SUMMARY: AddressSanitizer: heap-buffer-overflow
(/workspace/new-test/fuzzdir/fz-binutils/fz-nm/nm+0x43268c) in strncmp
Shadow bytes around the buggy address:
0x0c0c7fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c0c7fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c0c7fff8000: fa fa fa fa 00 00 00 00 00 00 05 fa fa fa fa fa
0x0c0c7fff8010: 00 00 00 00 00 00 00 fa fa fa fa fa 00 00 00 00
0x0c0c7fff8020: 00 00 00 fa fa fa fa fa 00 00 00 00 00 00 00 05
=>0x0c0c7fff8030: fa fa fa fa 00 00 00 00 00 00[02]fa fa fa fa fa
0x0c0c7fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8080: 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
Shadow gap: cc
==1983516==ABORTING
POC
https://drive.google.com/file/d/1nWTkCqzxdajk451n0G-BYAluMMzqAP9m/view?usp=sharing
redit
Xiaoguo Li (CUPL)
Xudong Cao (UCAS)
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