Your rule will exclude if
there is a referer header at all, and not just if the offending value appears
in the referer header.
What you would want to do
is use the following location:
REQUEST_FILENAME|ARGS|ARGS_NAMES|REQUEST_HEADERS|!REQUEST_HEADERS:Referer
This way you exclude the
referer header from the list of locations searched.
To get:
SecRule REQUEST REQUEST_FILENAME|ARGS|ARGS_NAMES|REQUEST_HEADERS|!REQUEST_HEADERS:Referer
"(?:(?:[\;\|]\W*?\b(?:c(?:h(?:grp|mod|own|sh)|md|pp|c)|p(?:asswd|ython|erl|ing|s)|n(?:asm|map|c)|f(?:inger|tp)|(?:kil|mai)l|g(?:\+\+|cc)|(?:xte)?rm|ls(?:of)?|telnet|uname|echo|id)|\/(?:c(?:h(?:grp|mod|own|sh)|pp|c)|p(?:asswd|ython|erl|ing|s)|n(?:asm|map|c)|f(?:inger|tp)|(?:kil|mai)l|g(?:\+\+|cc)|(?:xte)?rm|ls(?:of)?|telnet|uname|echo|id))\b|\b(?:(?:n(?:et(?:\b\W*?\blocalgroup|\.exe)|(?:map|c)\.exe)|t(?:racer(?:oute|t)|elnet\.exe|clsh8?|ftp)|w(?:g(?:uest\.exe|et)|sh\.exe)|(?:rcmd|ftp)\.exe|echo\b\W*?\by+)\b|c(?:md(?:(?:32)?\.exe\b|\b\W*?\\\/c)|hmod\b\.{1,100}?\+.{1,3}x|d\b(?:\W*?\\\/|\W*\b..))))"
\
"deny,auditlog,id:50006,severity:4,msg:'(default/generic_attacks.conf)
System Command Injection'"
By the way, you may have noticed in the rule set that
I assumed that SQL injection and XSS would generate false positives on the
referer header and it is already excluded in the rule set. I did not anticipate
for command injections. Can you tell me what pattern in the referer triggers
this?
Thanks
~ Ofer
From: mod-security-users-bounces@xxxxxxxxxxxxxxxxxxxxx
[mailto:mod-security-users-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Dan Rossi
Sent: Thursday, November 30, 2006
5:32 AM
To:
mod-security-users@xxxxxxxxxxxxxxxxxxxxx
Subject: [mod-security-users]
chaining a current rule via id
hi i
would like to turn this rule off being triggered by the referer header so
passthrough if its a referer header for a location as its seem to trapping,
SecRule REQUEST_FILENAME|ARGS|ARGS_NAMES|REQUEST_HEADERS
"(?:(?:[\;\|]\W*?\b(?:c(?:h(?:grp|mod|own|sh)|md|pp|c)|p(?:asswd|ython|erl|ing|s)|n(?:asm|map|c)|f(?:inger|tp)|(?:kil|mai)l|g(?:\+\+|cc)|(?:xte)?rm|ls(?:of)?|telnet|uname|echo|id)|\/(?:c(?:h(?:grp|mod|own|sh)|pp|c)|p(?:asswd|ython|erl|ing|s)|n(?:asm|map|c)|f(?:inger|tp)|(?:kil|mai)l|g(?:\+\+|cc)|(?:xte)?rm|ls(?:of)?|telnet|uname|echo|id))\b|\b(?:(?:n(?:et(?:\b\W*?\blocalgroup|\.exe)|(?:map|c)\.exe)|t(?:racer(?:oute|t)|elnet\.exe|clsh8?|ftp)|w(?:g(?:uest\.exe|et)|sh\.exe)|(?:rcmd|ftp)\.exe|echo\b\W*?\by+)\b|c(?:md(?:(?:32)?\.exe\b|\b\W*?\\\/c)|hmod\b\.{1,100}?\+.{1,3}x|d\b(?:\W*?\\\/|\W*\b..))))"
\
"deny,auditlog,id:50006,severity:4,msg:'(default/generic_attacks.conf)
System Command Injection'"
im not very crash hot with my regexp, is this right ?
SecRule REQUEST_HEADERS "!(Referer)"
"chain,deny,auditlog,id:50006,severity:4,msg:'(custom.conf) System Command
Injection'"
SecRule REQUEST_FILENAME|ARGS|ARGS_NAMES|REQUEST_HEADERS
"(?:(?:[\;\|]\W*?\b(?:c(?:h(?:grp|mod|own|sh)|md|pp|c)|p(?:asswd|ython|erl|ing|s)|n(?:asm|map|c)|f(?:inger|tp)|(?:kil|mai)l|g(?:\+\+|cc)|(?:xte)?rm|ls(?:of)?|telnet|uname|echo|id)|\/(?:c(?:h(?:grp|mod|own|sh)|pp|c)|p(?:asswd|ython|erl|ing|s)|n(?:asm|map|c)|f(?:inger|tp)|(?:kil|mai)l|g(?:\+\+|cc)|(?:xte)?rm|ls(?:of)?|telnet|uname|echo|id))\b|\b(?:(?:n(?:et(?:\b\W*?\blocalgroup|\.exe)|(?:map|c)\.exe)|t(?:racer(?:oute|t)|elnet\.exe|clsh8?|ftp)|w(?:g(?:uest\.exe|et)|sh\.exe)|(?:rcmd|ftp)\.exe|echo\b\W*?\by+)\b|c(?:md(?:(?:32)?\.exe\b|\b\W*?\\\/c)|hmod\b\.{1,100}?\+.{1,3}x|d\b(?:\W*?\\\/|\W*\b..))))"
\
"deny,auditlog,id:50006,severity:4,msg:'(default/generic_attacks.conf)
System Command Injection'"
it seems i have to do this for alot of rules and locations, id rather not have
to copy over the entire rule to override, just chain a rule by its id, is it
possible ?
