TITLE:
ATutor Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA16915

VERIFY ADVISORY:
http://secunia.com/advisories/16915/

CRITICAL:
Highly critical

IMPACT:
Cross Site Scripting, Exposure of sensitive information, System
access

WHERE:
>From remote

SOFTWARE:
ATutor 1.x
http://secunia.com/product/5252/

DESCRIPTION:
Secunia Research has discovered some vulnerabilities in ATutor, which
can be exploited by malicious people to conduct cross-site scripting
attacks, disclose sensitive information, and compromise a vulnerable
system.

1) Input passed to the "addslashes", "asc", and "desc" parameters in
"include/html/forum.inc.php" isn't properly verified, before it is
used to create a function call. This can be exploited to call an
arbitrary PHP function with an arbitrary parameter (e.g. execute
arbitrary shell commands with the "exec" function).

Examples:
http://[host]/include/html/forum.inc.php?addslashes=[function]&asc=[parameter]
http://[host]/include/html/forum.inc.php?addslashes=[function]&desc=[parameter]

Successful exploitation requires that "register_globals" is enabled.

2) Input passed to the "section" parameter in "body_header.inc.php"
and "print.php" isn't properly verified, before it is used to include
files. This can be exploited to include arbitrary files from local
resources.

Examples:
http://[host]/documentation/common/body_header.inc.php?section=[file]%00
http://[host]/documentation/common/print.php?section=[file]%00

Successful exploitation requires that "register_globals" is enabled
and that "magic_quotes_gpc" is disabled.

3) Input passed to the "_base_href" parameter in
"admin/translate.php", the "_base_path" parameter in
"include/html/editor_tabs/news.inc.php", and the "p" parameter in
"documentation/add_note.php" isn't 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.

The vulnerabilities have been confirmed in version 1.5.1-pl1. Other
versions may also be affected.

SOLUTION:
Apply patch.
http://atutor.ca/view/3/6158/1.html

The fixes will also be included in the upcoming 1.5.2 version.

PROVIDED AND/OR DISCOVERED BY:
Andreas Sandblad, Secunia Research

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2005-55/advisory/

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About:
This Advisory was delivered by Secunia as a free service to help
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