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SQL Injection - Getting around addslashes() |
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 Posted: Thu Aug 26, 2010 8:14 pm |
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| shadowplayer |
| Beginner |
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| Joined: Aug 26, 2010 |
| Posts: 2 |
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Hi guys =)
I'm stuck with this injection, please help me with some ideas.
The query is (watch quotes):
| Code: | | SELECT users.* FROM users WHERE true AND users.email = '{$email}' |
Setting email to %00 (null) consumes the last single-quote in the query.
Problem:
Single-quotes (only single ones) are escaped by addslashes() (maybe magic_quotes). I've tried with multibyte chars like this:
Not working either... I'm getting escaped quotes.
Any ideas? |
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Re: SQL Injection - Getting around addslashes() |
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| Posted: Fri Aug 27, 2010 3:42 pm |
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| shadowplayer |
| Beginner |
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| Joined: Aug 26, 2010 |
| Posts: 2 |
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| Posted: Mon Aug 30, 2010 1:15 am |
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| julioisaias |
| Valuable expert |
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| Joined: Jan 25, 2008 |
| Posts: 50 |
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_________________
I study enough to make the rest a result. |
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| Posted: Mon Aug 30, 2010 11:19 am |
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| waraxe |
| Site admin |
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| Joined: May 11, 2004 |
| Posts: 2407 |
| Location: Estonia, Tartu |
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If magic_quotes_gpc=on or if addslashes(), mysql_escape_string(), mysql_real_escape_string() is used for incoming data sanitization, then there is no sql injection. Sql injection occurs when (examples) :
1. magic_quotes_gpc=off (easy to exploit)
2. stripslashes() is used (easy to exploit)
3. urldecode() or rawurldecode() is used (easy to exploit)
4. magic_quotes_runtime=off (second order injection, specific cases, hard to exploit)
5. specific cases related to sql truncation (hard to exploit)
By the way, when magic_quotes_gpc=on, then null byte (%00) trick will not work either, becasue it will be escaped too. |
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