MyBB < 1.8.6 Arbitrary Code Execution

Critical Nessus Network Monitor Plugin ID 9946

Synopsis

The remote web server is running a PHP application that is vulnerable to an arbitrary code execution attack vector.

Description

Versions of MyBB (MyBulletinBoard) prior to 1.8.6 are affected by a flaw in the '__wakeup()' method that is triggered when deserializing specially crafted GMP objects. This may allow a remote attacker to potentially execute arbitrary code.

Solution

Upgrade to MyBB version 1.8.6 or later.

See Also

http://seclists.org/fulldisclosure/2017/Jan/55

https://mybb.com

Plugin Details

Severity: Critical

ID: 9946

Family: CGI

Published: 2017/02/09

Modified: 2017/04/04

Dependencies: 9126

Risk Information

Risk Factor: Critical

CVSSv2

Base Score: 10

Temporal Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSSv3

Base Score: 9.8

Temporal Score: 9.1

Vector: CVSS3#AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS3#E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mybb:mybb

Patch Publication Date: 2015/02/15

Vulnerability Publication Date: 2017/01/21