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TITLE:
yblog SQL Injection and Cross-Site Scripting

SECUNIA ADVISORY ID:
SA30607

VERIFY ADVISORY:
http://secunia.com/advisories/30607/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting, Manipulation of data, Exposure of sensitive
information

WHERE:
>From remote

SOFTWARE:
yblog 0.x
http://secunia.com/product/19055/

DESCRIPTION:
unohope has discovered some vulnerabilities in yblog, which can be
exploited by malicious people to conduct cross-site scripting and SQL
injection attacks.

1) Input passed to the "q" parameter in search.php is not properly
sanitised before being used in SQL queries. This can be exploited to
manipulate SQL queries by injecting arbitrary SQL code.

Successful exploitation of this vulnerability allows e.g. retrieving
usernames and passwords, but requires that "magic_quotes_gpc" is
disabled.

2) Input passed to the "n" parameter in user.php is not properly
sanitised before being used in SQL queries. This can be exploited to
manipulate SQL queries by injecting arbitrary SQL code.

Successful exploitation of this vulnerability allows e.g. retrieving
usernames and passwords, but requires that "register_globals" is
enabled and that "magic_quotes_gpc" is disabled.

3) Input passed to the "q" parameter in search.php is not properly
sanitised before being returned to the user. This can be exploited to
execute arbitrary HTML and script code in a user's browser session in
context of an affected site.

4) Input passed to the "n" parameter in user.php is not properly
sanitised before being returned to the user. This can be exploited to
execute arbitrary HTML and script code in a user's browser session in
context of an affected site.

Successful exploitation of this vulnerability requires that
"register_globals" is enabled.

5) Input passed to the "n" parameter in uss.php is not properly
sanitised before being returned to the user. This can be exploited to
execute arbitrary HTML and script code in a user's browser session in
context of an affected site.

Successful exploitation of this vulnerability requires that
"register_globals" is enabled and that the target user has valid user
credentials.

The vulnerabilities are confirmed in version 0.2.2.2. Other versions
may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
unohope

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/5773

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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