The product does not properly restrict reading from or writing to dynamically-identified variables.
Many languages offer powerful features that allow the programmer to access arbitrary variables that are specified by an input string. While these features can offer significant flexibility and reduce development time, they can be extremely dangerous if attackers can modify unintended variables that have security implications.
Threat Mapped score: 0.0
Industry: Finiancial
Threat priority: Unclassified
CVE: CVE-2006-7135
extract issue enables file inclusion
CVE: CVE-2006-7079
Chain: extract used for register_globals compatibility layer, enables path traversal (CWE-22)
CVE: CVE-2007-0649
extract() buried in include files makes post-disclosure analysis confusing; original report had seemed incorrect.
CVE: CVE-2006-6661
extract() enables static code injection
CVE: CVE-2006-2828
import_request_variables() buried in include files makes post-disclosure analysis confusing
CVE: CVE-2009-0422
Chain: Dynamic variable evaluation allows resultant remote file inclusion and path traversal.
CVE: CVE-2007-2431
Chain: dynamic variable evaluation in PHP program used to modify critical, unexpected $_SERVER variable for resultant XSS.
CVE: CVE-2006-4904
Chain: dynamic variable evaluation in PHP program used to conduct remote file inclusion.
CVE: CVE-2006-4019
Dynamic variable evaluation in mail program allows reading and modifying attachments and preferences of other users.
N/A
N/A
| Phase | Note |
|---|---|
| Implementation | N/A |
Intro: This code uses the credentials sent in a POST request to login a user.
Body: The call to extract() will overwrite the existing values of any variables defined previously, in this case $isAdmin. An attacker can send a POST request with an unexpected third value "isAdmin" equal to "true", thus gaining Admin privileges.
//Log user in, and set $isAdmin to true if user is an administrator function login($user,$pass){ $query = buildQuery($user,$pass); mysql_query($query); if(getUserRole($user) == "Admin"){ $isAdmin = true; } } $isAdmin = false; extract($_POST); login(mysql_real_escape_string($user),mysql_real_escape_string($pass));