Skip to content

A NULL pointer dereference in the function do_directive() modules/preprocs/nasm/nasm-pp.c:2355 #169

Open
@Clingto

Description

System info:
Ubuntu 16.04.6 LTS, X64, gcc 5.4.0, yasm (latest master 009450c)
I think it is probably a similar issue as #142
Compile Command:

$ ./autogen.sh
make distclean

CC=gcc CXX=g++ CFLAGS="-fsanitize=address -fno-omit-frame-pointer -g" CXXFLAGS="-fsanitize=address -fno-omit-frame-pointer -g" ./configure --prefix=$PWD/build --disable-shared
make -j
make install

Run Command:

$ yasm  $POC

POC file:
https://github.com/Clingto/POC/blob/master/MSA/yasm/yasm-2352-do_directive-null-pointer-deref

ASAN info:

yasm: file name already has no extension: output will be in `yasm.out'
ASAN:SIGSEGV
=================================================================
==14280==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000001 (pc 0x7f6361db4b98 bp 0x7ffe9673f060 sp 0x7ffe9673ece0 T0)
    #0 0x7f6361db4b97 in do_directive  test/yasm-uaf/SRC_asan/modules/preprocs/nasm/nasm-pp.c:2355
    #1 0x7f6361dc0333 in pp_getline  test/yasm-uaf/SRC_asan/modules/preprocs/nasm/nasm-pp.c:5083
    #2 0x7f6361da9d46 in nasm_preproc_get_line  test/yasm-uaf/SRC_asan/modules/preprocs/nasm/nasm-preproc.c:198
    #3 0x7f6361d9b2ac in nasm_parser_parse  test/yasm-uaf/SRC_asan/modules/parsers/nasm/nasm-parse.c:218
    #4 0x7f6361d8f36b in nasm_do_parse  test/yasm-uaf/SRC_asan/modules/parsers/nasm/nasm-parser.c:66
    #5 0x7f6361d8f36b in nasm_parser_do_parse  test/yasm-uaf/SRC_asan/modules/parsers/nasm/nasm-parser.c:83
    #6 0x402c84 in do_assemble  test/yasm-uaf/SRC_asan/frontends/yasm/yasm.c:521
    #7 0x402c84 in main  test/yasm-uaf/SRC_asan/frontends/yasm/yasm.c:753
    #8 0x7f6364ee182f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #9 0x403ee8 in _start ( test/yasm-uaf/bin_asan/bin/yasm+0x403ee8)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV  test/yasm-uaf/SRC_asan/modules/preprocs/nasm/nasm-pp.c:2355 do_directive
==14280==ABORTING

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions