SB2020061952 - Improper Certificate Validation in Mattermost, Mattermost Server
Published: June 19, 2020 Updated: August 8, 2020
Security Bulletin ID
SB2020061952
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Certificate Validation (CVE-ID: CVE-2017-18909)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
An issue was discovered in Mattermost Server before 3.9.0 when SAML is used. Encryption and signature verification are not mandatory.
Remediation
Install update from vendor's website.