by Cem Onat Karagun

2020-03-23 19:03:06

Abstract

"Thread 35 "Chrome_InProcRe" received signal SIGSEGV, Segmentation fault."

Exploit & Code

# 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

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 (: 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 : lea r8,[rdi-0x8]
0x559e50c11182 : mov rcx,r8
0x559e50c11185 : shr rcx,0x3
=> 0x559e50c11189 : mov cl,BYTE PTR
[rcx+0x7fff8000]
0x559e50c1118f : test cl,cl
0x559e50c11191 :
jne 0x559e50c11418
0x559e50c11197 : add
rdi,0xffffffffffffffff
0x559e50c1119b : 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.









References

Keywords

chrome
poc
dos
remote