Moodle up to 2.7.2 Web Service grades_external.php information disclosure

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 labeled as problematic has been found in Moodle. Affected by this issue is some unknown functionality in the library lib/classes/grades_external.php of the component Web Service. Executing a manipulation can lead to information disclosure. The identification of this vulnerability is CVE-2014-7831. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Moodle (Learning Management Software). This vulnerability affects an unknown part in the library lib/classes/grades_external.php of the component Web Service. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

lib/classes/grades_external.php in Moodle 2.7.x before 2.7.3 does not consider the moodle/grade:viewhidden capability before displaying hidden grades, which allows remote authenticated users to obtain sensitive information by leveraging the student role to access the get_grades web service.

The weakness was shared 11/24/2014 (Website). The advisory is shared for download at moodle.org. This vulnerability was named CVE-2014-7831 since 10/03/2014. The exploitation appears to be easy. The attack can be initiated remotely. A single authentication is necessary for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

By approaching the search of inurl:lib/classes/grades_external.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 (98718), SecurityFocus (BID 71123†) and Vulnerability Center (SBV-47449†). The entries VDB-72975, VDB-72974, VDB-72973 and VDB-72972 are related to this item. Once again VulDB remains the best 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: Information disclosure
CWE: CWE-200 / 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: 🔍

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
Status: Not defined
Confirmation: 🔍

CVE: CVE-2014-7831 (🔍)
GCVE (CVE): GCVE-0-2014-7831
GCVE (VulDB): GCVE-100-72964
X-Force: 98718
SecurityFocus: 71123 - Moodle 'core_grades_get_grades' Information Disclosure Vulnerability
SecurityTracker: 1031215
Vulnerability Center: 47449 - Moodle 2.7.x before 2.7.3 Remote Information Disclosure in lib/classes/grades_external.php - CVE-2014-7831, Medium

See also: 🔍

Entryinfo

Created: 03/27/2015 14:56
Updated: 04/04/2022 12:22
Changes: 03/27/2015 14:56 (60), 06/13/2017 09:18 (4), 04/04/2022 12:22 (3)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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