Improper validation of certificate with host mismatch in Couchbase Server Java SDK - CVE-2020-9040

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Main Vulnerability Database Vulnerabilities #VU51838

Improper validation of certificate with host mismatch in Couchbase Server Java SDK - CVE-2020-9040

Published: April 1, 2021


Vulnerability identifier: #VU51838
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-9040
CWE-ID: CWE-297
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Couchbase Server Java SDK
Software vendor:
Couchbase

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper validation of hosname in SSL certificates. A remote attacker can supply cryptographically valid certificate that will be accepted by Java SDK's Netty component due to missing hostname verification and perform MitM attack.


Remediation

Install updates from vendor's website.

External links