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phpSysInfo Information Disclosure
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SUMMARY
" <http://phpsysinfo.sourceforge.net/> phpSysInfo is a PHP script that
displays information about the host being accessed."
Improper design allows attackers to gain information about files on a
server using phpSysInfo.
DETAILS
Vulnerable Systems:
* phpSysInfo version 2.5.1
A vulnerability which allows an attacker to identify if a file exists on
the remote system has been identified. By supplying a directory traversal
string to lng= in a POST or GET request to index.php with a poison null
byte terminating %00 allows an attacker to determine if any file exists.
The vulnerable function is shown.
if (!file_exists(APP_ROOT . '/includes/lang/' . $lng
'.php')) {
An attacker can determine if the file exists by studying the returned
error message, valid files return the string ?Sorry, we don't support this
language.? and invalid files return the normal phpSysInfo application
page.
Example:
www.somesite.com/phpSysInfo/index.php?template=blue&lng=../../../../../../../../../../../var/log/httpd-error.log%00
ADDITIONAL INFORMATION
The information has been provided by <mailto:wh1t3h4t3@yahoo.co.uk>
Micheal Turner.
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