CVE-2024-32892 - Access of Resource Using Incompatible Type ('Type Confusion')

Severity

78%

Complexity

18%

Confidentiality

98%

In handle_init of goodix/main/main.c, there is a possible memory corruption due to type confusion. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS 3.1 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Demo Examples

Access of Resource Using Incompatible Type ('Type Confusion')

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

CWE-843

The following Perl code is intended to look up the privileges for user ID's between 0 and 3, by performing an access of the $UserPrivilegeArray reference. It is expected that only userID 3 is an admin (since this is listed in the third element of the array).


               
print "\$UserPrivilegeArray = $UserPrivilegeArray\n";
print "Regular user!\n";
print "Admin!\n";

In this case, the programmer intended to use "$UserPrivilegeArray->{$userID}" to access the proper position in the array. But because the subscript was omitted, the "user" string was compared to the scalar representation of the $UserPrivilegeArray reference, which might be of the form "ARRAY(0x229e8)" or similar.

Since the logic also "fails open" (CWE-636), the result of this bug is that all users are assigned administrator privileges.

While this is a forced example, it demonstrates how type confusion can have security consequences, even in memory-safe languages.

Overview

First reported 11 months ago

2024-06-13 21:15:00

Last updated 6 months ago

2024-11-21 09:15:00

Affected Software

Google Android Operating System

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