Mattermost Server up to 5.3.x Credentials insufficiently protected credentials

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CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

A vulnerability was found in Mattermost Server up to 5.3.x and classified as critical. Affected by this issue is some unknown functionality of the component Credentials Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-522. Impacted is confidentiality. CVE summarizes:

An issue was discovered in Mattermost Server before 5.4.0. It mishandles possession of superfluous authentication credentials.

The weakness was released 06/19/2020 (Website). The advisory is shared for download at mattermost.com. This vulnerability is handled as CVE-2018-21248 since 06/19/2020. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1552.

Upgrading to version 5.4.0 eliminates this vulnerability.

Entries connected to this vulnerability are available at 156957, 156958, 156959 and 156960.

Productinfoedit

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CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2infoedit

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

NVD Base Score: 🔒

Exploitinginfoedit

Class: Information disclosure
CWE: CWE-522
ATT&CK: T1552

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mattermost Server 5.4.0

Timelineinfoedit

06/19/2020 Advisory disclosed
06/19/2020 +0 days VulDB entry created
06/19/2020 +0 days CVE assigned
10/25/2020 +128 days VulDB last update

Sourcesinfoedit

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

CVE: CVE-2018-21248 (🔒)
See also: 🔒

Entryinfoedit

Created: 06/19/2020 10:05 PM
Updated: 10/25/2020 02:10 PM
Changes: (1) advisory_confirm_url
Complete: 🔍

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