VDB-96357 · CVE-2016-9412 · BID 94395

MyBB/MyBB Merge System up to 1.8.6 Entropy access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.2	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in MyBB and MyBB Merge System up to 1.8.6. This affects an unknown function of the component Entropy. Performing a manipulation results in access control. This vulnerability is reported as CVE-2016-9412. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, was found in MyBB and MyBB Merge System up to 1.8.6 (Content Management System). This affects some unknown functionality of the component Entropy. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allow attackers to have unspecified impact via vectors related to low adminsid and sid entropy.

The bug was discovered 01/31/2017. The weakness was disclosed 01/31/2017 by Tim Coen (Paul) (Website). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2016-9412 since 11/17/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/08/2020). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 1.8.7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94395†). The entries VDB-96323, VDB-96324, VDB-96325 and VDB-96326 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Content Management System

Name

Version

License

open-source

Website

Product: https://mybb.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.6
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.4
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

OpenVAS ID: 100768
OpenVAS Name: MyBB Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: MyBB/MyBB Merge System 1.8.7

Timelineinfo

03/11/2016 🔍
11/17/2016 +251 days 🔍
01/31/2017 +75 days 🔍
01/31/2017 +0 days 🔍
01/31/2017 +0 days 🔍
02/01/2017 +1 days 🔍
08/08/2020 +1284 days 🔍

Sourcesinfo

Product: mybb.com

Advisory: openwall.com
Researcher: Tim Coen (Paul)
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-9412 (🔍)
GCVE (CVE): GCVE-0-2016-9412
GCVE (VulDB): GCVE-100-96357
SecurityFocus: 94395 - MyBB Prior to 1.8.7 Multiple Security Vulnerabilities
OSVDB: - CVE-2016-9412 - MyBB - Multiple Products - Unspecified Issue

See also: 🔍

Entryinfo

Created: 02/01/2017 07:16
Updated: 08/08/2020 17:31
Changes: 02/01/2017 07:16 (64), 08/08/2020 17:31 (8)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.