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TITLE:
Bigforum SQL Injection and Arbitrary File Upload Vulnerabilities

SECUNIA ADVISORY ID:
SA40329

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40329/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40329

RELEASE DATE:
2010-06-26

DISCUSS ADVISORY:
http://secunia.com/advisories/40329/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/40329/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
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 * Secunia CVSS Score
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https://ca.secunia.com/?page=viewadvisory&vuln_id=40329

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Some vulnerabilities have been discovered in Bigforum, which can be
exploited by malicious people to conduct SQL injection attacks and
compromise a vulnerable system.

1) Input passed to the "id" parameter in forum.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 requires that
"magic_quotes_gpc" is disabled.

2) An error exists in the handling of file uploads for avatars. This
can be exploited to upload arbitrary files inside the webroot and
e.g. execute arbitrary PHP code.

The vulnerabilities are confirmed in version 5.2. Other versions may
also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.
Restrict access to the "images/avatar/" directory (e.g. via
.htaccess).

PROVIDED AND/OR DISCOVERED BY:
1) JaMbA
2) Zer0 Thunder

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
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private users keeping their systems up to date against the latest
vulnerabilities.

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