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5.1	$0-$5k	0.00

A vulnerability has been found in Moodle (Learning Management Software) and classified as critical. This vulnerability affects some unknown functionality in the library lib/formslib.php. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect integrity. CVE summarizes:

The MoodleQuickForm class in lib/formslib.php in Moodle through 2.1.10, 2.2.x before 2.2.10, 2.3.x before 2.3.7, and 2.4.x before 2.4.4 does not properly handle a certain array-element syntax, which allows remote attackers to bypass intended form-data filtering via a crafted request.

The weakness was disclosed 05/24/2013 by Dan Poltawski as confirmed git commit (GIT Repository). The advisory is shared for download at git.moodle.org. This vulnerability was named CVE-2013-2083 since 02/19/2013. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

By approaching the search of inurl:lib/formslib.php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 66646 (Fedora 19 : moodle-2.4.4-1.fc19 (2013-8668)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.moodle.org.

The vulnerability is also documented in the databases at X-Force (84432) and Tenable (66646). The entries 64191, 64190 and 64189 are pretty similar.

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 2.1
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.1.10
• 2.2
• 2.2.1
• 2.2.2
• 2.2.3
• 2.2.4
• 2.2.5
• 2.2.6
• 2.2.7
• 2.2.8
• 2.2.9
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4
• 2.3.5
• 2.3.6
• 2.4.1
• 2.4.2
• 2.4.3

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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: Input validation
CWE: CWE-20
ATT&CK: Unknown

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

Nessus ID: 66646
Nessus Name: Fedora 19 : moodle-2.4.4-1.fc19 (2013-8668)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 865665
OpenVAS Name: Fedora Update for moodle FEDORA-2013-8692
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.moodle.org

Timelineinfo

02/19/2013 🔍
05/21/2013 +91 days 🔍
05/21/2013 +0 days 🔍
05/24/2013 +3 days 🔍
05/24/2013 +0 days 🔍
06/09/2013 +16 days 🔍
03/24/2015 +653 days 🔍
01/02/2022 +2476 days 🔍

Sourcesinfo

Product: moodle.org

Advisory: git.moodle.org
Researcher: Dan Poltawski
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-2083 (🔍)
X-Force: 84432
Vulnerability Center: 39912 - Moodle Remote Restriction Bypass due to Improper Handling of Specific Array-Element Syntax, Medium
SecurityFocus: 60024 - Moodle Form Elements Filtering CVE-2013-2083 Security Vulnerability

See also: 🔍

Entryinfo

Created: 03/24/2015 15:54
Updated: 01/02/2022 21:55
Changes: 03/24/2015 15:54 (66), 05/01/2017 17:52 (5), 01/02/2022 21:55 (3)
Complete: 🔍

Discussion

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