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Translator 534f75b696 Translated ['macos-hardening/macos-security-and-privilege-escalation/mac

2024-07-19 05:23:49 +00:00

3260 - Pentesting ISCSI

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Basic Information

From Wikipedia:

In computing, iSCSI is an acronym for Internet Small Computer Systems Interface, an Internet Protocol (IP)-based storage networking standard for linking data storage facilities. It provides block-level access to storage devices by carrying SCSI commands over a TCP/IP network. iSCSI is used to facilitate data transfers over intranets and to manage storage over long distances. It can be used to transmit data over local area networks (LANs), wide area networks (WANs), or the Internet and can enable location-independent data storage and retrieval.

The protocol allows clients (called initiators) to send SCSI commands (CDBs) to storage devices (targets) on remote servers. It is a storage area network (SAN) protocol, allowing organizations to consolidate storage into storage arrays while providing clients (such as database and web servers) with the illusion of locally attached SCSI disks. It mainly competes with Fibre Channel, but unlike traditional Fibre Channel which usually requires dedicated cabling, iSCSI can be run over long distances using existing network infrastructure.

Default port: 3260

PORT     STATE SERVICE VERSION
3260/tcp open  iscsi?

Opname

nmap -sV --script=iscsi-info -p 3260 192.168.xx.xx

Hierdie skrip sal aandui of outentisering vereis word.

Let wel: Jy mag vind dat wanneer jou teikens ontdek word, hulle onder 'n ander IP-adres gelys word. Dit gebeur dikwels as die iSCSI-diens blootgestel word via NAT of 'n virtuele IP. In sulke gevalle sal iscsiadmin misluk om te verbind. Dit vereis twee aanpassings: een aan die katalogusnaam van die node wat outomaties deur jou ontdekkingaktiwiteite geskep is, en een aan die default lêer wat in hierdie katalogus bevat is.

Byvoorbeeld, jy probeer om te verbind met 'n iSCSI-teiken op 123.123.123.123 op poort 3260. Die bediener wat die iSCSI-teiken blootstel, is eintlik op 192.168.1.2 maar blootgestel via NAT. isciadm sal die interne adres registreer eerder as die publieke adres:

iscsiadm -m discovery -t sendtargets -p 123.123.123.123:3260
192.168.1.2:3260,1 iqn.1992-05.com.emc:fl1001433000190000-3-vnxe
[...]

Hierdie opdrag sal 'n gids in jou lêerstelsel skep soos volg:

/etc/iscsi/nodes/iqn.1992-05.com.emc:fl1001433000190000-3-vnxe/192.168.1.2\,3260\,1/

Binnen die gids is daar 'n standaardlêer met al die instellings wat nodig is om met die teiken te verbind.

Hernoem /etc/iscsi/nodes/iqn.1992-05.com.emc:fl1001433000190000-3-vnxe/192.168.1.2\,3260\,1/ na /etc/iscsi/nodes/iqn.1992-05.com.emc:fl1001433000190000-3-vnxe/123.123.123.123\,3260\,1/
Binne /etc/iscsi/nodes/iqn.1992-05.com.emc:fl1001433000190000-3-vnxe/123.123.123.123\,3260\,1/default, verander die node.conn[0].address instelling om na 123.123.123.123 te wys in plaas van 192.168.1.2. Dit kan gedoen word met 'n opdrag soos sed -i 's/192.168.1.2/123.123.123.123/g' /etc/iscsi/nodes/iqn.1992-05.com.emc:fl1001433000190000-3-vnxe/123.123.123.123\,3260\,1/default

Jy kan nou die teiken monteer volgens die instruksies in die skakel.

Monteer ISCSI op Windows

Handmatige opsporing

sudo apt-get install open-iscsi

Example from iscsiadm docs:

Eerstens moet jy die teikens naam agter die IP ontdek:

iscsiadm -m discovery -t sendtargets -p 123.123.123.123:3260
123.123.123.123:3260,1 iqn.1992-05.com.emc:fl1001433000190000-3-vnxe
[2a01:211:7b7:1223:211:32ff:fea9:fab9]:3260,1 iqn.2000-01.com.synology:asd3.Target-1.d0280fd382
[fe80::211:3232:fab9:1223]:3260,1 iqn.2000-01.com.synology:Oassdx.Target-1.d0280fd382

Note dat dit die IP en poort van die interfaces sal wys waar jy die teikens kan bereik. Dit kan selfs interne IP's of verskillende IP's van die een wat jy gebruik het, wys.

Dan vang jy die 2de deel van die gedrukte string van elke lyn (iqn.1992-05.com.emc:fl1001433000190000-3-vnxe van die eerste lyn) en probeer om in te log:

iscsiadm -m node --targetname="iqn.1992-05.com.emc:fl1001433000190000-3-vnxe" -p 123.123.123.123:3260 --login
Logging in to [iface: default, target: iqn.1992-05.com.emc:fl1001433000190000-3-vnxe, portal: 123.123.123.123,3260] (multiple)
Login to [iface: default, target: iqn.1992-05.com.emc:fl1001433000190000-3-vnxe, portal: 123.123.123.123,3260] successful.

Dan kan jy logout gebruik met –logout

iscsiadm -m node --targetname="iqn.1992-05.com.emc:fl1001433000190000-3-vnxe" -p 123.123.123.123:3260 --logout
Logging out of session [sid: 6, target: iqn.1992-05.com.emc:fl1001433000190000-3-vnxe, portal: 123.123.123.123,3260]
Logout of [sid: 6, target: iqn.1992-05.com.emc:fl1001433000190000-3-vnxe, portal: 123.123.123.123,3260] successful.

Ons kan meer inligting daaroor vind deur net sonder enige --login/--logout parameter te gebruik

iscsiadm -m node --targetname="iqn.1992-05.com.emc:fl1001433000190000-3-vnxe" -p 123.123.123.123:3260
# BEGIN RECORD 2.0-873
node.name = iqn.1992-05.com.emc:fl1001433000190000-3-vnxe
node.tpgt = 1
node.startup = manual
node.leading_login = No
iface.hwaddress = <empty>
iface.ipaddress = <empty>
iface.iscsi_ifacename = default
iface.net_ifacename = <empty>
iface.transport_name = tcp
iface.initiatorname = <empty>
iface.bootproto = <empty>
iface.subnet_mask = <empty>
iface.gateway = <empty>
iface.ipv6_autocfg = <empty>
iface.linklocal_autocfg = <empty>
iface.router_autocfg = <empty>
iface.ipv6_linklocal = <empty>
iface.ipv6_router = <empty>
iface.state = <empty>
iface.vlan_id = 0
iface.vlan_priority = 0
iface.vlan_state = <empty>
iface.iface_num = 0
iface.mtu = 0
iface.port = 0
node.discovery_address = 192.168.xx.xx
node.discovery_port = 3260
node.discovery_type = send_targets
node.session.initial_cmdsn = 0
node.session.initial_login_retry_max = 8
node.session.xmit_thread_priority = -20
node.session.cmds_max = 128
node.session.queue_depth = 32
node.session.nr_sessions = 1
node.session.auth.authmethod = None
node.session.auth.username = <empty>
node.session.auth.password = <empty>
node.session.auth.username_in = <empty>
node.session.auth.password_in = <empty>
node.session.timeo.replacement_timeout = 120
node.session.err_timeo.abort_timeout = 15
node.session.err_timeo.lu_reset_timeout = 30
node.session.err_timeo.tgt_reset_timeout = 30
node.session.err_timeo.host_reset_timeout = 60
node.session.iscsi.FastAbort = Yes
node.session.iscsi.InitialR2T = No
node.session.iscsi.ImmediateData = Yes
node.session.iscsi.FirstBurstLength = 262144
node.session.iscsi.MaxBurstLength = 16776192
node.session.iscsi.DefaultTime2Retain = 0
node.session.iscsi.DefaultTime2Wait = 2
node.session.iscsi.MaxConnections = 1
node.session.iscsi.MaxOutstandingR2T = 1
node.session.iscsi.ERL = 0
node.conn[0].address = 192.168.xx.xx
node.conn[0].port = 3260
node.conn[0].startup = manual
node.conn[0].tcp.window_size = 524288
node.conn[0].tcp.type_of_service = 0
node.conn[0].timeo.logout_timeout = 15
node.conn[0].timeo.login_timeout = 15
node.conn[0].timeo.auth_timeout = 45
node.conn[0].timeo.noop_out_interval = 5
node.conn[0].timeo.noop_out_timeout = 5
node.conn[0].iscsi.MaxXmitDataSegmentLength = 0
node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144
node.conn[0].iscsi.HeaderDigest = None
node.conn[0].iscsi.DataDigest = None
node.conn[0].iscsi.IFMarker = No
node.conn[0].iscsi.OFMarker = No
# END RECORD

Daar is 'n skrip om die basiese subnet enumerasieproses te outomatiseer beskikbaar by iscsiadm

Shodan

port:3260 AuthMethod

Verwysings

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10 KiB

Raw Blame History

3260 - Pentesting ISCSI

Basic Information

Opname

Brute force

Mount ISCSI op Linux

Monteer ISCSI op Windows

Handmatige opsporing

Shodan

Verwysings

10 KiB Raw Blame History Unescape Escape

3260 - Pentesting ISCSI

Basic Information

Opname

Brute force

Mount ISCSI op Linux

Monteer ISCSI op Windows

Handmatige opsporing

Shodan

Verwysings

10 KiB

Raw Blame History