Transcript E-security - Common flaws - Loud-Fat

KBOM
Aim

Develop a series of Success Factors for
infrastructure security

Demonstrate the Success Factors in a Physical
security analogy

Extend the analogy to the Digital world

Describe typical faults in infrastructure
security
Good Security
Security Success Factors

Multiple layers of protection
- Defence in-depth
- No direct access to customer data

Utilises multiple technologies including
- Access control
- Breach detection
- Auditing or recording key events


Should integrate Human and Mechanised
systems
What is not specific required is denied
Security systems
Testing the key success factors in
the real world
Good Security: A Physical Analogy
Security
Camera
Motion
Detector
Guard
Security Success Factors Applied
Multiple technologies including
Access control
Breach detection
Auditing
Ensures one fault does not put the
crown jewels at risk
Use of manual and digital security
Multiple layers of security
- “buys” time to repel
attacker and prevents bert
endangering the jewels
Guard
E-security systems
Relating the digital-world to the
real world
E-security systems
A model that works
Countermeasures – Digital &
Door + Lock =
Physical
Firewall
Security Camera =
Activity Logs
Movement Sensors =
Intrusion Detection
Security Guard =
Security Technician
Physical Asset =
Digital Asset
System
Logs
Security Success Factors Applied
Security
Interface of manual and digital security
Console
Alert
Multiple technologies including
Access control
Breach detection
Internet
Auditing
Corporate
Network
data
Ensures one fault does not put
the crown jewels at risk
Audit
Logs
Multiple layers of security
-“buys” time to repel
attacker and prevents bert
endangering the jewels
-Customer data not inDMZ
Common Faults
Common Faults
Overall configuration & design
No proper design
documentation – only a
collection of clip-art
Design rules applied with no
understanding so forCorporate
Databases
example multiple firewalls
No ip addresses or server Customer Enterpris
provide no extra protection
Data
e
details etc
Encrypted
Systems
No Desk Check done !!!!!
information securely
Too much newFurther
and diverse
transferring over the
technology – multiple
protectionUNIX
of
Data checking ing
Internet
Internet
Internal
Firewall
the IntranetOS
& Multiple
IntranetWindows
Perimeter
download edWeb
scripts
Server
Firewall
versions make it operational
Standing data stored in
DMZonly protected by
1
Merchant
Layer of security
securely
identified via
Certificates
?
Central role
of the
application
server that
will connect
to all data
Timesources
Authentication flawedNo
or centralised
Certification
User server or logging server
SPI Unencrypted
Authority
securely
identified via
certificates
Application
Serverunviable
Authentication
and permissions
?
Internet
Databases
SET payment
No administration
access
protocol that
or
terminal
servers
so
sends
the user’s
Bank
details
directly
when things go wrongtoit is
the bank
impossible to get access
Common Faults: Router
Access
lists absent,
incomplete or applied to
the wrong interface
SNMP
Corporate
Network
Internet
open with
Community string of
Public & ... (Go on, have
a guess)
Telnet
open - allowing
unrestricted terminal
access to the internet
Audit
Logs
Small
services open
And even if the perimeter router isn’t yours
WHO PAYS THE PRICE IF IT IS HACKED
Bad Config - router 1 of 1
pants#show startup-config
hostname pants
enable password cisco
interface Serial0/0
ip address 194.117.132.10 255.255.255.252
interface FastEthernet1/0
ip address 192.188.144.81 255.255.255.252
ip route 0.0.0.0 0.0.0.0 194.117.132.9
ip route 192.193.97.65 255.255.255.255 195.188.144.82
snmp-server community public RO
snmp-server community private RW
line con 0
line aux 0
line vty 0 4
password cisco
login
!
After
After router 1 of 2
service password-encryption
no service udp-small-servers
no service tcp-small-servers
hostname pants
enable secret 5 $1$s1gN$TDLK8LhaSdgKlDUpR84OY1
enable password notused
!
interface Serial0/0
ip address 192.117.132.10 255.255.255.8
ip access-group 102 in
!
interface FastEthernet1/0
ip address 195.188.144.81 255.255.255.0
! ip access-group 103 in
After router 1 of 2
! Management controls
access-list 1 permit 193.193.97.65
access-list 1 permit 193.193.116.0 0.0.0.255
!
! Spoof & rfc 1918 filter
access-list 102 deny ip 195.188.144.0 0.0.0.255 any
access-list 102 deny ip 10.0.0.0 0. 255 . 255 .255 any
!
! Traffic filter
access-list 102 permit tcp any host 195.188.144.68 eq www
access-list 102 permit tcp any host 195.188.144.66 eq smtp
access-list 102 permit ip any host 195.188.144.66
!
! Egress rules
access-list 103 permit ip 195.188.144.0 0.0.0.255 any
access-list 103 deny ip any any
snmp-server community x1xx RO
1
snmp-server community x1xx RW 1
line con 0
password GMxQttt98
login
line aux 0
line vty 0 4
access-class 1 in
password Tmtttts
login
Common Faults - Firewalls
No anti-spoofing
Default passwords,
Rules or Config
Unused services
Rules confused
Corporate
Network
Internet
+ undocumented
 No consideration given
to error logging or the
return connection (which
can stop many hacks !!!)
Audit
Logs
Changes to the
Configuration not logged
No reporting of
authorisation failures
Before Pix 1 of 3
nameif ethernet0 outside security0
nameif ethernet1 inside security100
hostname firewall
fixup protocol ftp 21
fixup protocol http 80
fixup protocol smtp 25
fixup protocol h323 1720
fixup protocol sqlnet 1521
names
pager lines 24
no logging console
no logging monitor
no logging buffered errors
no logging trap
logging facility 20
Before Pix 2 of 3
interface ethernet0 auto
interface ethernet1 auto
ip address outside 11.73.2.222 255.255.255.0
ip address inside 11.73.7.251 255.255.255.0
nat (inside) 0 0.0.0.0 0.0.0.0 0 0
static (inside,outside) 11.73.1.2 161.73.1.2 netmask 255.255.255.255 0 0
static (inside,outside) 11.73.1.1 161.73.1.1 netmask 255.255.255.255 0 0
conduit permit tcp host 11.73.1.1 eq smtp any
conduit permit tcp host 11.73.1.2 eq www any
conduit permit tcp host 11.73.1.2 eq telnet any
Before Pix 3 of 3
apply (inside) 11 outgoing_src
rip outside passive
rip outside default
rip inside passive
rip inside default
route outside 0.0.0.0 0.0.0.0 161.73.2.234 1
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
telnet 11.73.140.99 255.255.255.255
telnet timeout 5
floodguard 1
Cryptochecksum:8c7bc2b51a5bd78305c83a14f13e9c7b
After
after Pix 1 of 3
nameif ethernet0 outside security0
nameif ethernet1 inside security100
hostname firewall
no fixup protocol ftp 21
fixup protocol http 80
fixup protocol smtp 25
no fixup protocol h323 1720
no fixup protocol sqlnet 1521
names
pager lines 24
no logging console
logging host 192.2.2.1
logging trap 3
logging facility 20
After Pix 2 of 3
interface ethernet0 auto
interface ethernet1 auto
ip address outside 11.73.2.222 255.255.255.0
ip address inside 11.73.7.251 255.255.255.0
nat (inside) 0 0.0.0.0 0.0.0.0 0 0
static (inside,outside) 11.73.1.2 161.73.1.2 netmask 255.255.255.255 0 0
static (inside,outside) 161.73.1.1 161.73.1.1 netmask 255.255.255.255 0 0
conduit permit tcp host 11.73.1.1 eq smtp any
conduit permit tcp host 11.73.1.2 eq www any
conduit permit tcp host 11.73.1.2 eq telnet any
outbound 11 permit 11.73.0.0 255.255.0.0 smtp tcp
outbound 11 deny 11.73.0.0 255.255.0.0 www tcp
apply (inside) 11 outgoing_src
After Pix 3 of 3
rip outside passive
rip outside default
rip inside passive
rip inside default
route outside 0.0.0.0 0.0.0.0 161.73.2.234 1
no snmp-server location
no snmp-server contact
no snmp-server community public
no snmp-server enable traps
telnet 11.73.140.99 255.255.255.255
telnet timeout 5
floodguard 1
Cryptochecksum:8c7bc2b51a5bd78305c83a14f13e9c7b
Firewall 1 - before
Firewall 1 - After
Common Faults - Web Server
Whoops
- SSL is not enabled
data in the DMZ –
Classical example of pointless
Multiple layers
Critical

Corporate
Network
Internet
Default CGI script or
Administration servlets only
protected by a simple
(Default!!) passwords
Developer
Audit
Logs
SDK and doco
available
Operating
systems not
properly hardened and
configured
Common Faults - Applications
Confidential
screens and
information (perhaps
passwords) unencrypted –
in URL or in cookies
Corporate
Network
Internet
Passwords
used for highvalue transactions
Application
authorization
that “should work” (as long
as you don’t try it)
Audit
Logs
No
proper application
logging or alerting –making
fraud easy
Common Faults - IDS
Focusing
on knownattacks rather than
anomalous traffic
Not
updating it regularly
-Attacks emerge every day
Encryption
Corporate
Network
Internet
-Encryption is our friend – but if you
install a network based IDS to monitor
encrypted traffic what is it
Putting
them in a wrong
place
Audit
Logs
-You don’t put a motion detector
outside your house
KBOM