This proof-of-concept crashes the Chrome renderer process using Tencent Blade Team's Magellan SQLite3 bug. It's based on a SQLite test case from the commit that fixed the bug.

This demo only works on Chrome 70 or below. Open this page in Chrome 70, then tap the button.

Your browser's user agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/87.0.4280.66 Safari/537.36

Source code for this page on GitHub.

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What's supposed to happen?

After you press the button, the page should crash:

On Android 5.1, I get a segfault in memcpy:

        F/libc    ( 3801): Fatal signal 11 (SIGSEGV), code 1, fault addr 0xe0ddb457 in tid 3854 (Database thread)
        I/DEBUG   (  142): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
        I/DEBUG   (  142): Build fingerprint: 'google/nakasi/grouper:5.1/LMY47D/1743759:user/release-keys'
        I/DEBUG   (  142): Revision: '0'
        I/DEBUG   (  142): ABI: 'arm'
        I/DEBUG   (  142): pid: 3801, tid: 3854, name: Database thread  >>> com.android.chrome:sandboxed_process6 <<<
        I/DEBUG   (  142): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0xe0ddb457
        I/DEBUG   (  142):     r0 e0ddb457  r1 611be0ab  r2 00000002  r3 ff000000
        I/DEBUG   (  142):     r4 611be038  r5 00000002  r6 611be0a9  r7 7fffffff
        I/DEBUG   (  142):     r8 00000001  r9 611be0ab  sl 80000001  fp 00000000
        I/DEBUG   (  142):     ip 00000066  sp 6defd3a0  lr 00000074  pc 4025eb62  cpsr 680f2430
        I/DEBUG   (  142): 
        I/DEBUG   (  142): backtrace:
        I/DEBUG   (  142):     #00 pc 0000fb62  /system/lib/libc.so (__memcpy_base+217)
        I/DEBUG   (  142):     #01 pc 018d0e1d  /data/app/com.android.chrome-1/base.apk

What's affected?

Affected: tested, causes one tab/one window to crash:

• Chrome 70.0.3538.110 on Android 5.1 and 9
• Electron 2.0.12 on macOS 10.14

Not affected:

• Chrome 71.0.3578.98 on Android 8.1 (already fixed)
• Safari (doesn't have FTS enabled in SQLite3)
• Browsers not based on Chrome (no WebSQL support)