VDB-96323 · CVE-2015-8973 · BID 94397

MyBB/MyBB Merge System up to 1.6.17/1.8.5 Forum Password xmlhttp.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.
7.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in MyBB and MyBB Merge System up to 1.6.17/1.8.5 and classified as critical. The impacted element is an unknown function of the file xmlhttp.php of the component Forum Password Handler. The manipulation leads to access control. This vulnerability is listed as CVE-2015-8973. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in MyBB and MyBB Merge System up to 1.6.17/1.8.5 (Content Management System) and classified as critical. This issue affects an unknown part of the file xmlhttp.php of the component Forum Password Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

xmlhttp.php in MyBB (aka MyBulletinBoard) before 1.6.18 and 1.8.x before 1.8.6 and MyBB Merge System before 1.8.6 allows remote attackers to bypass intended access restrictions via vectors related to the forum password.

The bug was discovered 11/10/2016. The weakness was presented 01/31/2017 (Website). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2015-8973 since 11/17/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 82 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:xmlhttp.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.6.18 or 1.8.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94397†). See VDB-96324, VDB-96325, VDB-96326 and VDB-96327 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: MyBB/MyBB Merge System 1.6.18/1.8.6

Timelineinfo

11/10/2016 🔍
11/17/2016 +7 days 🔍
11/17/2016 +0 days 🔍
01/31/2017 +75 days 🔍
01/31/2017 +0 days 🔍
02/01/2017 +1 days 🔍
08/08/2020 +1284 days 🔍

Sourcesinfo

Product: mybb.com

Advisory: openwall.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8973 (🔍)
GCVE (CVE): GCVE-0-2015-8973
GCVE (VulDB): GCVE-100-96323
SecurityFocus: 94397 - MyBB Prior to 1.8.6 Multiple Security Vulnerabilities
OSVDB: - CVE-2015-8973 - MyBB - Multiple Products - Security Bypass Issue

See also: 🔍

Entryinfo

Created: 02/01/2017 07:13
Updated: 08/08/2020 11:40
Changes: 02/01/2017 07:13 (61), 08/08/2020 11:40 (6)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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