VDB-96348 · CVE-2016-9403 · BID 94395

MyBB/MyBB Merge System up to 1.8.6 Permission Check newreply.php 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.
8.2	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in MyBB and MyBB Merge System up to 1.8.6. Affected is an unknown function of the file newreply.php of the component Permission Check. The manipulation results in access control. This vulnerability was named CVE-2016-9403. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in MyBB and MyBB Merge System up to 1.8.6 (Content Management System). Affected is an unknown function of the file newreply.php of the component Permission Check. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

newreply.php in MyBB (aka MyBulletinBoard) before 1.8.7 and MyBB Merge System before 1.8.7 allows remote attackers to have unspecified impact by leveraging a missing permission check.

The bug was discovered 01/31/2017. The weakness was presented 01/31/2017 by Tim Coen (Paul) (Website). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2016-9403 since 11/17/2016. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

By approaching the search of inurl:newreply.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.8.7 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94395†). See VDB-96323, VDB-96324, VDB-96325 and VDB-96326 for similar entries. Once again VulDB remains the best source for vulnerability data.

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: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

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-2016-9403 (🔍)
GCVE (CVE): GCVE-0-2016-9403
GCVE (VulDB): GCVE-100-96348
SecurityFocus: 94395 - MyBB Prior to 1.8.7 Multiple Security Vulnerabilities
OSVDB: - CVE-2016-9403 - MyBB - Multiple Products - Unspecified Issue

See also: 🔍

Entryinfo

Created: 02/01/2017 07:15
Updated: 08/08/2020 16:13
Changes: 02/01/2017 07:15 (65), 08/08/2020 16:13 (8)
Complete: 🔍
Cache ID: 216::103