Chapter 35 ADP
ZyWALL USG 1000 User’s Guide
622
DOUBLE-ENCODING
ATTACK
This rule is IIS specific. IIS does two passes through the
request URI, doing decodes in each one. In the first pass,
IIS encoding (UTF-8 unicode, ASCII, bare byte, and %u) is
done. In the second pass ASCII, bare byte, and %u
encodings are done.
IIS-BACKSLASH-
EVASION ATTACK
This is an IIS emulation rule that normalizes backslashes to
slashes. Therefore, a request-URI of “/abc\xyz” gets
normalized to “/abc/xyz”.
IIS-UNICODE-
CODEPOINT-ENCODING
ATTACK
This rule can detect attacks which send attack strings
containing non-ASCII characters encoded by IIS Unicode.
IIS Unicode encoding references the unicode.map file.
Attackers may use this method to bypass system
parameter checks in order to get information or privileges
from a web server.
MULTI-SLASH-
ENCODING ATTACK
This rule normalizes multiple slashes in a row, so something
like: “abc/////////xyz” get normalized to “abc/xyz”.
NON-RFC-DEFINED-
CHAR ATTACK
This rule lets you receive a log or alert if certain non-RFC
characters are used in a request URI. For instance, you may
want to know if there are NULL bytes in the request-URI.
NON-RFC-HTTP-
DELIMITER ATTACK
This is when a newline “\n” character is detected as a
delimiter. This is non-standard but is accepted by both
Apache and IIS web servers.
OVERSIZE-CHUNK-
ENCODING ATTACK
This rule is an anomaly detector for abnormally large chunk
sizes. This picks up the apache chunk encoding exploits and
may also be triggered on HTTP tunneling that uses chunk
encoding.
OVERSIZE-REQUEST-
URI-DIRECTORY ATTACK
This rule takes a non-zero positive integer as an argument.
The argument specifies the max character directory length
for URL directory. If a URL directory is larger than this
argument size, an alert is generated. A good argument
value is 300 characters. This should limit the alerts to IDS
evasion type attacks, like whisker.
SELF-DIRECTORY-
TRAVERSAL ATTACK
This rule normalizes self-referential directories. So, “/abc/./
xyz” gets normalized to “/abc/xyz”.
U-ENCODING ATTACK
This rule emulates the IIS %u encoding scheme. The %u
encoding scheme starts with a %u followed by 4
characters, like %uXXXX. The XXXX is a hex encoded value
that correlates to an IIS unicode codepoint. This is an ASCII
value. An ASCII character is encoded like, %u002f = /,
%u002e = ., etc.
UTF-8-ENCODING
ATTACK
The UTF-8 decode rule decodes standard UTF-8 unicode
sequences that are in the URI. This abides by the unicode
standard and only uses % encoding. Apache uses this
standard, so for any Apache servers, make sure you have
this option turned on. When this rule is enabled, ASCII
decoding is also enabled to enforce correct functioning.
Table 168
HTTP Inspection and TCP/UDP/ICMP Decoders (continued)
LABEL
DESCRIPTION
Summary of Contents for ZyWALL 1050
Page 2: ......
Page 30: ...Table of Contents ZyWALL USG 1000 User s Guide 30 ...
Page 31: ...31 PART I User s Guide ...
Page 32: ...32 ...
Page 38: ...Chapter 1 Introducing the ZyWALL ZyWALL USG 1000 User s Guide 38 ...
Page 46: ...Chapter 2 Features and Applications ZyWALL USG 1000 User s Guide 46 ...
Page 64: ...Chapter 3 Web Configurator ZyWALL USG 1000 User s Guide 64 ...
Page 74: ...Chapter 4 Installation Setup Wizard ZyWALL USG 1000 User s Guide 74 ...
Page 116: ...Chapter 6 Configuration Basics ZyWALL USG 1000 User s Guide 116 ...
Page 168: ...Chapter 7 Tutorials ZyWALL USG 1000 User s Guide 168 ...
Page 205: ...Chapter 8 L2TP VPN Example ZyWALL USG 1000 User s Guide 205 ...
Page 206: ...Chapter 8 L2TP VPN Example ZyWALL USG 1000 User s Guide 206 ...
Page 207: ...207 PART II Technical Reference ...
Page 208: ...208 ...
Page 222: ...Chapter 9 Dashboard ZyWALL USG 1000 User s Guide 222 ...
Page 264: ...Chapter 10 Monitor ZyWALL USG 1000 User s Guide 264 ...
Page 336: ...Chapter 13 Interfaces ZyWALL USG 1000 User s Guide 336 ...
Page 346: ...Chapter 14 Trunks ZyWALL USG 1000 User s Guide 346 ...
Page 362: ...Chapter 15 Policy and Static Routes ZyWALL USG 1000 User s Guide 362 ...
Page 376: ...Chapter 16 Routing Protocols ZyWALL USG 1000 User s Guide 376 ...
Page 396: ...Chapter 19 NAT ZyWALL USG 1000 User s Guide 396 ...
Page 401: ...Chapter 20 HTTP Redirect ZyWALL USG 1000 User s Guide 401 ...
Page 402: ...Chapter 20 HTTP Redirect ZyWALL USG 1000 User s Guide 402 ...
Page 424: ...Chapter 23 Authentication Policy ZyWALL USG 1000 User s Guide 424 ...
Page 442: ...Chapter 24 Firewall ZyWALL USG 1000 User s Guide 442 ...
Page 483: ...Chapter 25 IPSec VPN ZyWALL USG 1000 User s Guide 483 ...
Page 484: ...Chapter 25 IPSec VPN ZyWALL USG 1000 User s Guide 484 ...
Page 497: ...Chapter 26 SSL VPN ZyWALL USG 1000 User s Guide 497 ...
Page 498: ...Chapter 26 SSL VPN ZyWALL USG 1000 User s Guide 498 ...
Page 508: ...Chapter 27 SSL User Screens ZyWALL USG 1000 User s Guide 508 ...
Page 510: ...Chapter 28 SSL User Application Screens ZyWALL USG 1000 User s Guide 510 ...
Page 518: ...Chapter 29 SSL User File Sharing ZyWALL USG 1000 User s Guide 518 ...
Page 603: ...Chapter 34 IDP ZyWALL USG 1000 User s Guide 603 ...
Page 604: ...Chapter 34 IDP ZyWALL USG 1000 User s Guide 604 ...
Page 614: ...Chapter 35 ADP ZyWALL USG 1000 User s Guide 614 Figure 416 Profiles Protocol Anomaly ...
Page 625: ...Chapter 35 ADP ZyWALL USG 1000 User s Guide 625 ...
Page 626: ...Chapter 35 ADP ZyWALL USG 1000 User s Guide 626 ...
Page 658: ...Chapter 37 Content Filter Reports ZyWALL USG 1000 User s Guide 658 ...
Page 676: ...Chapter 38 Anti Spam ZyWALL USG 1000 User s Guide 676 ...
Page 698: ...Chapter 39 Device HA ZyWALL USG 1000 User s Guide 698 ...
Page 714: ...Chapter 40 User Group ZyWALL USG 1000 User s Guide 714 ...
Page 720: ...Chapter 41 Addresses ZyWALL USG 1000 User s Guide 720 ...
Page 732: ...Chapter 43 Schedules ZyWALL USG 1000 User s Guide 732 ...
Page 748: ...Chapter 45 Authentication Method ZyWALL USG 1000 User s Guide 748 ...
Page 770: ...Chapter 46 Certificates ZyWALL USG 1000 User s Guide 770 ...
Page 782: ...Chapter 48 SSL Application ZyWALL USG 1000 User s Guide 782 ...
Page 792: ...Chapter 49 Endpoint Security ZyWALL USG 1000 User s Guide 792 ...
Page 844: ...Chapter 50 System ZyWALL USG 1000 User s Guide 844 ...
Page 861: ...Chapter 51 Log and Report ZyWALL USG 1000 User s Guide 861 ...
Page 862: ...Chapter 51 Log and Report ZyWALL USG 1000 User s Guide 862 ...
Page 886: ...Chapter 54 Reboot ZyWALL USG 1000 User s Guide 886 ...
Page 888: ...Chapter 55 Shutdown ZyWALL USG 1000 User s Guide 888 ...
Page 908: ...Chapter 56 Troubleshooting ZyWALL USG 1000 User s Guide 908 ...
Page 916: ...Chapter 57 Product Specifications ZyWALL USG 1000 User s Guide 916 ...
Page 1070: ...Appendix E Open Software Announcements ZyWALL USG 1000 User s Guide 1070 ...