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Date: Mon, 1 Feb 2021 23:49:20 +0000
From: Aleksey Yeschenko <aleksey@...che.org>
To: oss-security@...ts.openwall.com
Subject: [CVE-2020-17516] Apache Cassandra internode encryption enforcement
vulnerability
CVE-2020-17516: Apache Cassandra doesn't enforce encryption setting on inbound internode connections
Severity:
Important
Vendor:
The Apache Software Foundation
Versions Affected:
Cassandra 2.1.0 to 2.1.22
Cassandra 2.2.0 to 2.2.19
Cassandra 3.0.0 to 3.0.23
Cassandra 3.11.0 to 3.11.9
Description:
When using ‘dc’ or ‘rack’ internode_encryption setting, a Cassandra instance allows both encrypted
and unencrypted connections. A misconfigured node or a malicious user can use the unencrypted
connection despite not being in the same rack or dc, and bypass mutual TLS requirement.
Mitigation:
Users of ALL versions should switch from ‘dc’ or ‘rack’ to ‘all’ internode_encryption setting, as they are inherently insecure
3.0.x users should additionally upgrade to 3.0.24
3.11.x users should additionally upgrade to 3.11.10
Credit:
This issue was discoverd by Jon Meredith
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