Moodle up to 3.4.7/3.5.4/3.6.2 Calendar information disclosure

Summaryinfo

A vulnerability identified as critical has been detected in Moodle up to 3.4.7/3.5.4/3.6.2. This impacts an unknown function of the component Calendar. The manipulation leads to information disclosure. This vulnerability is traded as CVE-2019-3848. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Moodle up to 3.4.7/3.5.4/3.6.2 (Learning Management Software) and classified as critical. This issue affects some unknown functionality of the component Calendar. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability was found in moodle before versions 3.6.3, 3.5.5 and 3.4.8. Permissions were not correctly checked before loading event information into the calendar's edit event modal popup, so logged in non-guest users could view unauthorised calendar events. (Note: It was read-only access, users could not edit the events.)

The bug was discovered 03/19/2019. The weakness was shared 03/26/2019 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2019-3848 since 01/03/2019. The attack may be initiated remotely. A simple authentication is required for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 3.4.8, 3.5.5 or 3.6.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2022-2309). The entries VDB-132453, VDB-132452, VDB-132451 and VDB-132450 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.4.5
• 3.4.6
• 3.4.7
• 3.5.0
• 3.5.1
• 3.5.2
• 3.5.3
• 3.5.4
• 3.6.0
• 3.6.1
• 3.6.2

License

• open-source

Website

• Product: https://moodle.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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