Mattermost Server up to 5.21.x Markdown Renderer denial of service

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CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

A vulnerability, which was classified as problematic, was found in Mattermost Server up to 5.21.x. Affected is some unknown functionality of the component Markdown Renderer. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. This is going to have an impact on availability. CVE summarizes:

An issue was discovered in Mattermost Server before 5.22.0. The markdown renderer allows attackers to cause a denial of service (client-side), aka MMSA-2020-0017.

The weakness was released 06/19/2020 (Website). The advisory is available at mattermost.com. This vulnerability is traded as CVE-2020-14450 since 06/19/2020. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 5.22.0 eliminates this vulnerability.

Entries connected to this vulnerability are available at 156956, 156957, 156958 and 156959.

Productinfoedit

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CPE 2.3infoedit

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CVSSv3infoedit

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

NVD Base Score: 🔒

Exploitinginfoedit

Class: Denial of service (CWE-404)
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mattermost Server 5.22.0

Timelineinfoedit

06/19/2020 Advisory disclosed
06/19/2020 +0 days CVE assigned
06/20/2020 +1 days VulDB entry created
10/25/2020 +127 days VulDB last update

Sourcesinfoedit

Advisory: mattermost.com
Status: Not defined
Confirmation: 🔒

CVE: CVE-2020-14450 (🔒)
See also: 🔒

Entryinfoedit

Created: 06/20/2020 08:07 AM
Updated: 10/25/2020 08:19 PM
Changes: (1) advisory_confirm_url
Complete: 🔍

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