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TITLE:
WikkaWiki Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA47034

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47034/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47034

RELEASE DATE:
2011-12-02

DISCUSS ADVISORY:
http://secunia.com/advisories/47034/#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/47034/

ONLY AVAILABLE IN CUSTOMER AREA:
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https://ca.secunia.com/?page=viewadvisory&vuln_id=47034

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:
A weakness and multiple vulnerabilities have been discovered in
WikkaWiki, which can be exploited by malicious users to manipulate
certain data, conduct SQL injection attacks, and compromise a
vulnerable system and by malicious people to disclose potentially
sensitive information, conduct cross-site request forgery attacks,
and compromise a vulnerable system.

1) The application allows users to perform certain actions via HTTP
requests without performing proper validity checks to verify the
requests. This can be exploited to e.g. delete a user when a
logged-in administrative user visits a specially crafted web page.

2) Input passed via the "file" POST parameter to wikka.php (when
"wakka" is set to a wiki page with "{{files}}" directive and "action"
is set to "delete") is not properly verified before being used to
delete files. This can be exploited to delete arbitrary files via
directory traversal attacks.

Successful exploitation requires administrative rights.

3) Input passed via the "file" parameter to wikka.php (when "wakka"
is set to a page with "{{files}}" directive and "action" is set to
"download") is not properly verified before being used to download
files. This can be exploited to download arbitrary files via
directory traversal attacks.

4) Input passed via the "default_comment_display" parameter to
wikka.php (when "wakka" is set to "UserSettings" and "action" is set
to "update") is not properly sanitised before being used in a SQL
query. This can be exploited to manipulate SQL queries by injecting
arbitrary SQL code.

5) Input passed via the "file" POST parameter to wikka.php (when
"wakka" is set to a wiki page with "{{files}}" directive and "upload"
is set to "Upload") is not properly verified before being used to
upload files. This can be exploited to e.g. upload and execute
arbitrary PHP files with an e.g. ".php.mm" extension.

Successful exploitation requires administrative rights or
"INTRANET_MODE" to be enabled (disabled by default).

6) Input passed via the "User-Agent" header to wikka.php (when
"wakka" is set to a wiki page and appended "/addcomment") is not
properly sanitised before being written to a certain file. This can
be exploited to inject and potentially execute arbitrary commands.

Successful exploitation requires access rights to post comments,
"spam_logging" to be enabled (disabled by default), and
"spamlog_path" to be set to a file name suitable for PHP execution by
the web server ("spamlog.txt.php" by default).

The vulnerabilities are confirmed in version 1.3.2. Other versions
may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised and
verified. Do not browse untrusted websites or follow untrusted links
while logged in to the application.

PROVIDED AND/OR DISCOVERED BY:
Egidio Romano aka EgiX

ORIGINAL ADVISORY:
http://www.exploit-db.com/exploits/18177/

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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

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