New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open

hope-fly opened this issue

Dec 31, 2021

· 0 comments

Comments

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 casepoc.js

(JSON.stringify([1, 2, 3]))((JSON.parse-6.54*21e2)(JSON.stringify([1, 2, 3])));

​Execution steps & Output

$ ./mjs/build/mjs poc.js ASAN:DEADLYSIGNAL ================================================================= ==61059==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x56205ea42cf1 bp 0x00000000007c sp 0x7ffdf0132cb8 T0) ==61059==The signal is caused by a READ memory access. ==61059==Hint: address points to the zero page. #0 0x56205ea42cf0 in mjs_json_stringify src/mjs_json.c:273 #1 0x56205ea42cf0 in mjs_json_stringify src/mjs_json.c:272 #2 0x56205ea42cf0 in mjs_json_stringify src/mjs_json.c:272 #3 0x56205ea42cf0 in mjs_op_json_stringify src/mjs_json.c:494 #4 0x56205ead6955 in cs_varint_decode src/common/cs_varint.c:65 #5 0x56205eaa1a05 in mjs_strcmp src/mjs_string.c:228 #6 0x60b000000082 (<unknown module>)

AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV src/mjs_json.c:273 in mjs_json_stringify

Credits: Found by OWL337 team.

1 participant