oracle database communication protocol -...

Oracle Database Communication Protocol

Roman BazhinZeroNights E.0x04@nezlooy

a pentester’s view, or rude Oracle experiments

Who am ISecurity researcher at Digital Security

[email protected]@nezlooy

Agenda• Motivation• Oracle Client Drivers• Oracle Net Architecture• Oracle Database Protocol• TNSIntruder• Limitations and defense

MotivationВсё началось с задачи

Interaction Scheme

RAC Node 1

RAC Node 2

OracleClient

Interaction Scheme

RAC Node 1

RAC Node 2

OracleClient Over 50 requests

per module

Testing Scheme

Oracle Client NProxy / Fuzzer

Reverse Fuzzing

Client Fuzzserver

SYN

ACK

SYN-ACK

Reverse Fuzzing

Client Fuzzserver

SYN

ACK

REQUESTSYN-ACK

RESPONSE

Reverse Fuzzing

Client Fuzzserver

SYN

ACK

REQUEST

REQUEST

SYN-ACK

RESPONSE

RESPONSE

Reverse Fuzzing

Client Fuzzserver

SYN

ACK

REQUEST

REQUEST

SYN-ACK

RESPONSE

RESPONSE

Опа-опа… На на*!

Reverse Fuzzing

Client Fuzzserver

SYN

ACK

REQUEST

REQUEST

SYN-ACK

RESPONSE

RESPONSE

Striped hat / Ethical gop-stopping

Pentester Requirements

OracleClientMITM Proxy

Только давай без палева!

• Replaying• Modifying

• Spoofing• Injecting• etc.

Hm, and what about protocol?

Oracle Client NProxy / Fuzzer

? ?

Эу… Чё там с протоколом?

GooglingИ чё есть в этих ваших интернетах?

• Oracle TNS Protocolhttp://www.thesprawl.org/research/oracle-tns-protocol/Basic information about headers, type of packets / For beginners / Outdated.

• Wireshark TNS data dissector.http://anonsvn.wireshark.org/wireshark/trunk/epan/dissectors/packet-tns.cOnly headers, type of packets / Already have one.

• Presentations by Jonah Harrishttp://oracle-internals.com/Basic information about headers, TTC, server internals / Good.

• Oracle Protocol by Gwen Shapirahttp://www.pythian.com/blog/repost-oracle-protocol/Description of some types of messages, marshalling / Very good but outdated :(

GooglingИ чё есть в этих ваших интернетах?

• pytnsproxy by László Tóthhttp://soonerorlater.hu/index.khtml?article_id=515Oracle 9i, 10g and 11g MITM-attack tool.

• pytnspoison by Joxean Korethttp://seclists.org/fulldisclosure/2012/Apr/204Oracle 9i, 10g and 11g TNS Listener Poison exploitation tool.

• Amoebahttps://code.google.com/p/amoeba/Amoeba is a Distributing database proxy / no longer supported.

CodeНу норм, чё :/

pytnspoison

CodeВаще норм, чё :/

pytnsproxy

CodeТож норм :/

Amoeba

Client DriversКак проблему порешаем?

Oracle Client Drivers overview

OCI

10g, 11g, 12c

JDBC .NET

Oracle Client Drivers overview

OCI

10g, 11g, 12c

JDBC .NET ThinThin

Oracle Net ArchitectureЧё там в авторских доках?

Oracle Net Architecture

Application

OCI/JDBC/.NET

Two-Task Common (TTC)

Oracle Net Foundation Layer

Oracle Protocol SupportOracle Net

Client

Oracle Net Architecture

Application

OCI/JDBC/.NET



Oracle Protocol SupportOracle Net TCP TCPS NP SDP

TNSNetwork Session (NS)

Network Transport (NT)

Network Naming (NN)

Oracle Net Architecture (OSI view)Application (OCI/JDBC/.NET)


Oracle Net

Transport layer

Network layer

Data link layer

Physical layer

Oracle Net Architecture (Server)

Server

OPI



Oracle Protocol SupportOracle Net

RDBMS

Oracle Database ProtocolАйда поподробнее!

• Types and formats of messages• Sequence of messages• Fields• Serialization (Marshalling)

Types and formats of messagesTransparent Network Substrate (TNS)

0000 00 00 00 9F 06 00 00 00 00 00 DE AD BE EF 00 95

0010 0A 20 00 00 00 04 00 00 04 00 03 00 00 00 00 00

0020 04 00 05 0A 20 00 00 00 08 00 01 09 09 09 09 09

0030 09 09 09 00 12 00 01 DE AD BE EF 00 03 00 00 00

0040 04 00 04 00 01 00 02 00 03 00 01 00 03 00 00 00

0050 00 00 04 00 05 0A 20 00 00 00 02 00 03 E0 E1 00

0060 02 00 06 FC FF 00 02 00 02 00 00 00 00 00 04 00

0070 05 0A 20 00 00 00 0C 00 01 00 01 08 0A 06 03 02

0080 0B 0C 0F 10 11 00 03 00 02 00 00 00 00 00 04 00

0090 05 0A 20 00 00 00 06 00 01 00 01 03 04 05 06 00

Types and formats of messagesTransparent Network Substrate (TNS)

0000 00 9F 00 00 06 00 00 00 00 00 DE AD BE EF 00 95

0010 0A 20 00 00 00 04 00 00 04 00 03 00 00 00 00 00

0020 04 00 05 0A 20 00 00 00 08 00 01 09 09 09 09 09

0030 09 09 09 00 12 00 01 DE AD BE EF 00 03 00 00 00

0040 04 00 04 00 01 00 02 00 03 00 01 00 03 00 00 00

0050 00 00 04 00 05 0A 20 00 00 00 02 00 03 E0 E1 00

0060 02 00 06 FC FF 00 02 00 02 00 00 00 00 00 04 00

0070 05 0A 20 00 00 00 0C 00 01 00 01 08 0A 06 03 02

0080 0B 0C 0F 10 11 00 03 00 02 00 00 00 00 00 04 00

0090 05 0A 20 00 00 00 06 00 01 00 01 03 04 05 06 00

Packet Size

Packet Checksum

Packet Type

Header Flags

Header Checksum

Types and formats of messagesTransparent Network Substrate (TNS) in Oracle 12c

0000 00 00 00 9F 06 00 00 00 00 00 DE AD BE EF 00 95

0010 0A 20 00 00 00 04 00 00 04 00 03 00 00 00 00 00

0020 04 00 05 0A 20 00 00 00 08 00 01 09 09 09 09 09

0030 09 09 09 00 12 00 01 DE AD BE EF 00 03 00 00 00

0040 04 00 04 00 01 00 02 00 03 00 01 00 03 00 00 00

0050 00 00 04 00 05 0A 20 00 00 00 02 00 03 E0 E1 00

0060 02 00 06 FC FF 00 02 00 02 00 00 00 00 00 04 00

0070 05 0A 20 00 00 00 0C 00 01 00 01 08 0A 06 03 02

0080 0B 0C 0F 10 11 00 03 00 02 00 00 00 00 00 04 00

0090 05 0A 20 00 00 00 06 00 01 00 01 03 04 05 06 00

Packet Size

Packet Type

Header Flags

Header Checksum

Types and formats of messagesTNS / Packet Types:

• CONNECT = 0x01• ACCEPT = 0x02• ACKNOWLEDGE = 0x03• REFUSE = 0x04• REDIRECT = 0x05• DATA = 0x06• NULL = 0x07

• ABORT = 0x09• RESEND = 0x0B• MARKER = 0x0C• ATTENTION = 0x0D• CONTROL INFORMATION * = 0x0E• DATA DESCRIPTOR * = 0x0F

* Observed in Oracle 12c

Types and formats of messagesDATA Packet Type

0000 00 9F 00 00 06 00 00 00 00 00 DE AD BE EF 00 95

0010 0A 20 00 00 00 04 00 00 04 00 03 00 00 00 00 00

0020 04 00 05 0A 20 00 00 00 08 00 01 09 09 09 09 09

0030 09 09 09 00 12 00 01 DE AD BE EF 00 03 00 00 00

0040 04 00 04 00 01 00 02 00 03 00 01 00 03 00 00 00

0050 00 00 04 00 05 0A 20 00 00 00 02 00 03 E0 E1 00

0060 02 00 06 FC FF 00 02 00 02 00 00 00 00 00 04 00

0070 05 0A 20 00 00 00 0C 00 01 00 01 08 0A 06 03 02

0080 0B 0C 0F 10 11 00 03 00 02 00 00 00 00 00 04 00

0090 05 0A 20 00 00 00 06 00 01 00 01 03 04 05 06 00

Data flag

DATA = 0x00MORE * = 0x20EOF = 0x40

* Observed in Oracle 12c

Types and formats of messagesAdditional Network Options Negotiation (ANO)

Magic constant0000 00 9F 00 00 06 00 00 00 00 00 DE AD BE EF 00 95

0010 0A 20 00 00 00 04 00 00 04 00 03 00 00 00 00 00

0020 04 00 05 0A 20 00 00 00 08 00 01 09 09 09 09 09

0030 09 09 09 00 12 00 01 DE AD BE EF 00 03 00 00 00

0040 04 00 04 00 01 00 02 00 03 00 01 00 03 00 00 00

0050 00 00 04 00 05 0A 20 00 00 00 02 00 03 E0 E1 00

0060 02 00 06 FC FF 00 02 00 02 00 00 00 00 00 04 00

0070 05 0A 20 00 00 00 0C 00 01 00 01 08 0A 06 03 02

0080 0B 0C 0F 10 11 00 03 00 02 00 00 00 00 00 04 00

0090 05 0A 20 00 00 00 06 00 01 00 01 03 04 05 06 00

Types and formats of messagesTwo-Task Interface (TTI)

0000 00 00 00 A7 06 20 00 00 00 00 03 76 01 01 01 07

0010 01 01 01 01 05 01 01 4F 52 41 55 53 45 52 01 0D

0020 0D 41 55 54 48 5F 54 45 52 4D 49 4E 41 4C 01 07

0030 07 75 6E 6B 6E 6F 77 6E 00 01 0F 0F 41 55 54 48

0040 5F 50 52 4F 47 52 41 4D 5F 4E 4D 01 10 10 4A 44

0050 42 43 20 54 68 69 6E 20 43 6C 69 65 6E 74 00 01

0060 0C 0C 41 55 54 48 5F 4D 41 43 48 49 4E 45 01 0B

0070 0B 41 42 43 41 42 43 44 45 2D 70 63 00 01 08 08

0080 41 55 54 48 5F 50 49 44 01 04 04 31 32 33 34 00

0090 01 08 08 41 55 54 48 5F 53 49 44 01 08 08 72 2E

Function ID

Subfunction ID

Sequence number *

* Used only in the client request

Types and formats of messagesTTC / TTI commands:

• TTIPRO # Set protocol• TTIDTY # Set datatypes• TTIFUN # Start of user function• TTIOER # Error / Selecting completed• TTIRXH # Row transfer header• TTIRXD # Row transfer data• …

• TTIRPA # Return OPI Parameter• TTISTA # Oracle func complete• TTIIOV # I/O vector• TTILOBD # LOB/FILE data follows• TTIDCB # Describe information• TTIPFN # Piggyback func follows• …




Client data requests

Types and formats of messagesTTC / TTI subfunction:

• TTIFUN• OSESSKEY• OAUTH• OVERSION• OALL8• OFETCH• OLOBOPS• OCOMMIT• OROLLBACK• OPING• OCLOSE

• TTIPFN• O80SES• OCCA

• …




Server data responses

Sequence of messagesAuthentication

Client Server

CONNECT

ANO

TTIPROACCEPT

ANO

TTIPROTTIDTY

TTIDTYTTIFUN -> OSESSKEY

TTIRPATTIFUN -> OAUTH

TTIRPATTIFUN -> OVERSION *

TTIRPA* Thin client, OCI use TTIPFN -> O80SES or not used at all

Sequence of messagesSelecting

Client Server

TTIFUN -> OALL8

TTIFUN -> OFETCHTTIDCB

TTIRXH


Client Server

TTIPFN -> OCCA

TTIDCBTTIFUN -> OFETCH

TTIOER


Client Server

TTIFUN -> OALL8

TTIDCBTTIFUN -> OFETCH

TTIRXHTTIFUN -> OLOBOPS

TTILOBDDATA *DATADATA

* Observed in Oracle 10g and 11g

TTIFUN -> OLOBOPS

TTIRPA

Sequence of messagesLogging Off

Client ServerTTIFUN -> OLOGOFF *

EOFTTISTA

* OCI, Thin client use TTIPFN -> OCCA

TTIFUN -> OROLLBACK

TTISTA

TTIFUN -> OCOMMIT

TTISTA

Fieldslengthpkt_checksumtypeflaghdr_checksumdata_flagdata_flagdata_iddata_idsigdata_idanooverall_data_sizeversion_int_1version_str_1serviceoptions_flag_or_service_to_be_usedservice_svtimeout

seqNumberpacketVersionlowestVersionoptionssduSizetduSizeprotocolCharacteristicsundefined1HWByteOrderdataLendataOffmaxReceivedDataanoFlagsanoEnabledb4paddinglargeSDUsduSizetduSizefunc

lag0flag1noAnoServicesnoAnoServicesextendedtimeoutticktimeoutreconnectAddrLenreconnectAddrOfflargeSDUsduSizetduSizesessionpoolEnabledtimestampLastIOsduSizetduSizeisBreak

A_MAGIC1dataLenintVersionstrVersionSupervisoroptionsserviceSvserviceSvSubserviceSvMarkerserviceSvShortVer1serviceSvShortVer2serviceSvIntVersionserviceSvStrVersiondriversdriversTypecurPIDjunkobjLenobjType

Serialization (Marshalling)Data Types:

• UB1, SB1 (UBInt8, SBInt8)• UB2, SB2 (UBInt16, SBInt16)• UB4, SB4 (UBInt32, SBInt32)• SB8 (SBInt64)• UWORD, SWORD (UBInt32, SBInt32)• B1Array (UB1 Array)• B4Array (UB4 Array)• O2U (B1/B4Array)• NULLPTR (O2U(False))• PTR (O2U(True))

• CLR (B1Array[64])• CHR (UB1Array)• TEXT (CString)• DALC (SB4, CLR)• KEYVAL (DALC, DALC, UB4)• KPDKV (DALC, DALC, UB2)• UCS2 (UB2)• RefCursor (SB4)• BFILE / BLOB / CLOB

Serialization (Marshalling)Some magic

TNSIntruderЗацени, братюня!

TNSIntruderUtility written in Python, works as a database proxy.Support Oracle Databases 10g, 11g, 12c

Features:• Classes and marshalling engine• Collector of sequences• Injecting arbitrary SQL queries (Session hijacking)

DemoЭу… пацанчик, гони видео!

TNSIntruderNecessary to implement:

• PL/SQL support• Network Data Encryption and Integrity Checks support

Whish list:• SQL-parser• Java-backdoors uploader in hijacked session *

* And ODAT (Oracle Database Attacking Tool) features supporting

TNSIntruder

https://github.com/nezlooy

Limitations and defenseГопай аккуратнее!

Limitations and defense• Channel

• Network Data Encryption and Integrity Checks• PKI (Oracle wallets)

• Data protection• Authentication

• Database attacks• Oracle Database Firewall• Antifraud solutions

BonusПацанчики из Оракла жгут!

Gop-stopping of Instant Clients

10.2.0.5.0 11.2.0.4.0 12.1.0.2.0

Fuzzing with pyZZUF and Radamsa

• OCI• Was fuzzed only 6 server responses

Gop-stopping of Instant ClientsFuzzing with pyZZUF and Radamsa

(9) (7) (9)10.2.0.5.0 11.2.0.4.0 12.1.0.2.0

• OCI• Was fuzzed only 6 server responses• Unique faults

AV_READ, AV_WRITE, AV_EXEC, HEAP_CORRUPTS

Questions?Вопросы есть? А если найду?

Thank You

nezlooy

От души, братюни!

oracle database communication protocol -...

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