VERSION
Chrome Version: 57.0.2987.21 beta (64-bit), pepflashplayer 24.0.0.221
Operating System: Windows 7 en 64-bit

REPRODUCTION CASE

Open the poc in the attachment with chrome and observe the crash.
There is also a detailed write-up about the vulnerability in the attachment.


FOR CRASHES, PLEASE INCLUDE THE FOLLOWING ADDITIONAL INFORMATION
Type of crash: tab
Crash State: 

(1608.1948): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
pepflashplayer!PPP_ShutdownBroker+0x21704e:
000007fe`de7db84e 498b88c0000000  mov     rcx,qword ptr [r8+0C0h] ds:00000000`800000b0=????????????????
0:000> k
Child-SP          RetAddr           Call Site
00000000`0019da00 000007fe`de7db9f2 pepflashplayer!PPP_ShutdownBroker+0x21704e
00000000`0019da60 000007fe`de86f470 pepflashplayer!PPP_ShutdownBroker+0x2171f2
00000000`0019dab0 000007fe`de7d5103 pepflashplayer!PPP_ShutdownBroker+0x2aac70
00000000`0019db90 000007fe`de9b2a15 pepflashplayer!PPP_ShutdownBroker+0x210903
00000000`0019dda0 000007fe`de7ada8a pepflashplayer!PPP_ShutdownBroker+0x3ee215
00000000`0019e550 000007fe`de7aeade pepflashplayer!PPP_ShutdownBroker+0x1e928a
00000000`0019e5b0 000007fe`de7f7339 pepflashplayer!PPP_ShutdownBroker+0x1ea2de
00000000`0019e870 000007fe`de7f72e6 pepflashplayer!PPP_ShutdownBroker+0x232b39
00000000`0019e8a0 000007fe`de7bd111 pepflashplayer!PPP_ShutdownBroker+0x232ae6
00000000`0019e8f0 000007fe`de5db75d pepflashplayer!PPP_ShutdownBroker+0x1f8911
00000000`0019e980 000007fe`de60127b pepflashplayer!PPP_ShutdownBroker+0x16f5d
00000000`0019eb90 000007fe`de60118e pepflashplayer!PPP_ShutdownBroker+0x3ca7b
00000000`0019ebe0 000007fe`de60163c pepflashplayer!PPP_ShutdownBroker+0x3c98e
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files (x86)\Google\Chrome\Application\57.0.2987.21\chrome_child.dll - 
00000000`0019ec10 000007fe`e1c32574 pepflashplayer!PPP_ShutdownBroker+0x3ce3c
00000000`0019ec40 000007fe`e1c780d5 chrome_child!IsSandboxedProcess+0x216f4
00000000`0019ec70 000007fe`e1c4cf8a chrome_child!IsSandboxedProcess+0x67255
00000000`0019ece0 000007fe`e1c4cabc chrome_child!IsSandboxedProcess+0x3c10a
00000000`0019ed10 000007fe`e1c4cc06 chrome_child!IsSandboxedProcess+0x3bc3c
00000000`0019ed80 000007fe`e1c1df96 chrome_child!IsSandboxedProcess+0x3bd86
00000000`0019eef0 000007fe`e05d23fe chrome_child!IsSandboxedProcess+0xd116



Credit:

Yuki Chen Of Qihoo 360 Vulcan Team