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A few updates for SQL injection detection.

Browse source 
- The biggest change is the change in notice names from
	HTTP::SQL_Injection_Attack_Against to
	HTTP::SQL_Injection_Victim

- A few new SQL injection attacks in the tests that we need to
  support at some point.
This commit is contained in:
Seth Hall 2011-12-12 14:26:54 -05:00
parent 76a0b9ad3c
commit 61aa592db5
2 changed files with 12 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

16
scripts/policy/protocols/http/detect-sqli.bro
View file

@ -12,12 +12,12 @@ export {
SQL_Injection_Attacker,
## Indicates that a host was seen to have SQL injection attacks against
## it. This is tracked by IP address as opposed to hostname.
SQL_Injection_Attack_Against,
SQL_Injection_Victim,
};
redef enum Metrics::ID += {
SQL_ATTACKER,
SQL_ATTACKS_AGAINST,
SQLI_ATTACKER,
SQLI_VICTIM,
};
redef enum Tags += {
@ -56,14 +56,14 @@ event bro_init() &priority=3
# determine when it looks like an actual attack and how to respond when
# thresholds are crossed.
Metrics::add_filter(SQL_ATTACKER, [$log=F,
Metrics::add_filter(SQLI_ATTACKER, [$log=F,
$notice_threshold=sqli_requests_threshold,
$break_interval=sqli_requests_interval,
$note=SQL_Injection_Attacker]);
Metrics::add_filter(SQL_ATTACKS_AGAINST, [$log=F,
Metrics::add_filter(SQLI_VICTIM, [$log=F,
$notice_threshold=sqli_requests_threshold,
$break_interval=sqli_requests_interval,
$note=SQL_Injection_Attack_Against]);
$note=SQL_Injection_Victim]);
}
event http_request(c: connection, method: string, original_URI: string,
@ -73,7 +73,7 @@ event http_request(c: connection, method: string, original_URI: string,
{
add c$http$tags[URI_SQLI];
Metrics::add_data(SQL_ATTACKER, [$host=c$id$orig_h], 1);
Metrics::add_data(SQL_ATTACKS_AGAINST, [$host=c$id$resp_h], 1);
Metrics::add_data(SQLI_ATTACKER, [$host=c$id$orig_h], 1);
Metrics::add_data(SQLI_VICTIM, [$host=c$id$resp_h], 1);
}
}

10
testing/btest/scripts/policy/protocols/http/test-sql-injection-regex.bro
View file

@ -42,6 +42,8 @@ event bro_init ()
#add positive_matches["/index.asp?ARF_ID=(1/(1-(asc(mid(now(),18,1))\(2^7) mod 2)))"];
#add positive_matches["/index.php' and 1=convert(int,(select top 1 table_name from information_schema.tables))--sp_password"];
#add positive_matches["/index.php?id=873 and user=0--"];
#add positive_matches["?id=1;+if+(1=1)+waitfor+delay+'00:00:01'--9"];
#add positive_matches["?id=1+and+if(1=1,BENCHMARK(728000,MD5(0x41)),0)9"];
# The positive_matches below are from the mod_security evasion challenge.
# All supported attacks are uncommented.
@ -95,14 +97,6 @@ event bro_init ()
#add negative_matches["/index/hmm.gif?utmdt=Record > Create a Graph"];
#add negative_matches["/index.php?test='||\x0aTO_CHAR(foo_bar.Foo_Bar_ID)||"];
local regex =
/[\?&][^[:blank:]\x00-\x37\|]+?=[\-[:alnum:]%]+([[:blank:]\x00-\x37]|\/\*.*?\*\/)*['"]?([[:blank:]\x00-\x37]|\/\*.*?\*\/|\)?;)+.*?([hH][aA][vV][iI][nN][gG]|[uU][nN][iI][oO][nN]|[eE][xX][eE][cC]|[sS][eE][lL][eE][cC][tT]|[dD][eE][lL][eE][tT][eE]|[dD][rR][oO][pP]|[dD][eE][cC][lL][aA][rR][eE]|[cC][rR][eE][aA][tT][eE]|[iI][nN][sS][eE][rR][tT])([[:blank:]\x00-\x37]|\/\*.*?\*\/)+/
| /[\?&][^[:blank:]\x00-\x37\|]+?=[\-0-9%]+([[:blank:]\x00-\x37]|\/\*.*?\*\/)*['"]?([[:blank:]\x00-\x37]|\/\*.*?\*\/|\)?;)+([xX]?[oO][rR]|[nN]?[aA][nN][dD])([[:blank:]\x00-\x37]|\/\*.*?\*\/)+['"]?(([^a-zA-Z&]+)?=|[eE][xX][iI][sS][tT][sS])/
| /[\?&][^[:blank:]\x00-\x37]+?=[\-0-9%]*([[:blank:]\x00-\x37]|\/\*.*?\*\/)*['"]([[:blank:]\x00-\x37]|\/\*.*?\*\/)*(-|=|\+|\|\|)([[:blank:]\x00-\x37]|\/\*.*?\*\/)*([0-9]|\(?[cC][oO][nN][vV][eE][rR][tT]|[cC][aA][sS][tT])/
| /[\?&][^[:blank:]\x00-\x37\|]+?=([[:blank:]\x00-\x37]|\/\*.*?\*\/)*['"]([[:blank:]\x00-\x37]|\/\*.*?\*\/|;)*([xX]?[oO][rR]|[nN]?[aA][nN][dD]|[hH][aA][vV][iI][nN][gG]|[uU][nN][iI][oO][nN]|[eE][xX][eE][cC]|[sS][eE][lL][eE][cC][tT]|[dD][eE][lL][eE][tT][eE]|[dD][rR][oO][pP]|[dD][eE][cC][lL][aA][rR][eE]|[cC][rR][eE][aA][tT][eE]|[rR][eE][gG][eE][xX][pP]|[iI][nN][sS][eE][rR][tT])([[:blank:]\x00-\x37]|\/\*.*?\*\/|[\[(])+[a-zA-Z&]{2,}/
| /[\?&][^[:blank:]\x00-\x37]+?=[^\.]*?([cC][hH][aA][rR]|[aA][sS][cC][iI][iI]|[sS][uU][bB][sS][tT][rR][iI][nN][gG]|[tT][rR][uU][nN][cC][aA][tT][eE]|[vV][eE][rR][sS][iI][oO][nN]|[lL][eE][nN][gG][tT][hH])\(/
| /\/\*![[:digit:]]{5}.*?\*\//;
print "If anything besides this line prints out, there is a problem.";
for ( test in positive_matches )
{