SB2020061955 - Multiple vulnerabilities in Mattermost, Mattermost Server

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2020061955

SB2020061955 - Multiple vulnerabilities in Mattermost, Mattermost Server

Published: June 19, 2020 Updated: August 8, 2020

Security Bulletin ID SB2020061955
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 83% Low 17%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 vulnerabilities.


1) Insufficiently protected credentials (CVE-ID: CVE-2019-20881)

CWE-ID: CWE-522 - Insufficiently Protected Credentials

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks against MFA.


2) Incorrect default permissions (CVE-ID: CVE-2019-20882)

CWE-ID: CWE-276 - Incorrect Default Permissions

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote non-authenticated attacker to manipulate data.

An issue was discovered in Mattermost Server before 5.8.0. It does not honor the domain requirement when processing a join request for an open team.


3) Incorrect permission assignment for critical resource (CVE-ID: CVE-2019-20883)

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote authenticated user to manipulate data.

An issue was discovered in Mattermost Server before 5.8.0, when Town Square is set to Read-Only. Users can pin or unpin a post.


4) Incorrect permission assignment for critical resource (CVE-ID: CVE-2019-20884)

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote non-authenticated attacker to manipulate data.

An issue was discovered in Mattermost Server before 5.8.0. It allows attackers to partially attach a file to more than one post.


5) Information disclosure (CVE-ID: CVE-2019-20885)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

An issue was discovered in Mattermost Server before 5.8.0. It does not always generate a robots.txt file.


6) Improper Privilege Management (CVE-ID: CVE-2019-20886)

CWE-ID: CWE-269 - Improper Privilege Management

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote non-authenticated attacker to manipulate data.

An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes inadvertently a system admin.


Remediation

Install update from vendor's website.

References