Moodle up to 2.7.2 Web Service externallib.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.
4.1	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Moodle. This issue affects some unknown processing in the library mod/forum/externallib.php of the component Web Service. This manipulation causes access control. This vulnerability is tracked as CVE-2014-7834. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Moodle (Learning Management Software) and classified as critical. Affected by this vulnerability is some unknown processing in the library mod/forum/externallib.php of the component Web Service. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality. The summary by CVE is:

mod/forum/externallib.php in Moodle 2.6.x before 2.6.6 and 2.7.x before 2.7.3 does not verify group permissions, which allows remote authenticated users to access a forum via the forum_get_discussions web service.

The weakness was disclosed 11/24/2014 by SkOd (Website). It is possible to read the advisory at moodle.org. This vulnerability is known as CVE-2014-7834 since 10/03/2014. The exploitation appears to be easy. The attack can be launched remotely. Required for exploitation is a single authentication. 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.

By approaching the search of inurl:mod/forum/externallib.php it is possible to find vulnerable targets with Google Hacking. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13071 (Moodle Multiple Security Vulnerabilities(MSA-14-0036 - MSA-14-0048)).

Upgrading to version 2.5.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (98713), SecurityFocus (BID 71126†) and Vulnerability Center (SBV-47452†). The entries VDB-72975, VDB-72974, VDB-72973 and VDB-72972 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 2.4.11
• 2.5
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.6
• 2.6.1
• 2.6.2
• 2.6.3
• 2.6.4
• 2.6.5
• 2.7
• 2.7.1
• 2.7.2

License

• open-source

Website

• Product: https://moodle.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

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

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Moodle 2.5.1

Timelineinfo

10/03/2014 🔍
11/17/2014 +45 days 🔍
11/17/2014 +0 days 🔍
11/24/2014 +7 days 🔍
11/24/2014 +0 days 🔍
12/08/2014 +14 days 🔍
03/27/2015 +109 days 🔍
04/04/2022 +2565 days 🔍

Sourcesinfo

Product: moodle.org

Advisory: moodle.org
Researcher: SkOd
Status: Not defined
Confirmation: 🔍

CVE: CVE-2014-7834 (🔍)
GCVE (CVE): GCVE-0-2014-7834
GCVE (VulDB): GCVE-100-72967
X-Force: 98713
SecurityFocus: 71126 - Moodle 'forum_get_discussions()' Function Security Bypass Vulnerability
SecurityTracker: 1031215
Vulnerability Center: 47452 - Moodle 2.6.x before 2.6.6 and 2.7.x before 2.7.3 Remote Security Bypass via the forum_get_discussions Web Service, Medium

See also: 🔍

Entryinfo

Created: 03/27/2015 14:56
Updated: 04/04/2022 12:52
Changes: 03/27/2015 14:56 (60), 06/13/2017 09:19 (5), 04/04/2022 12:52 (3)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

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