CVE-2019-0223
Description
A cryptographic weakness was discovered in qpid-proton's use of TLS. If the qpid-proton client was used without client certificates, it would accept an anonymous cipher offered by the server. A man-in-the-middle attacker could use this to silently intercept traffic that should have been encrypted.
Statement
Red Hat OpenStack Platform 14 (and its Operational Tools) is impacted by this flaw; other supported versions are not vulnerable.
Red Hat Virtualization 4 uses qpid-proton for katello-agent, which always uses client certificate authentication.
Red Hat Update Infrastructure 3 is impacted by this flaw, however in its default configuration client certificate authentication is used and qpidd service, which uses qpid-proton, cannot be reach from other machines.
Mitigation
This attack will not work if client-certificate authentication is in place because anonymous ciphers would not then be available.
Another possible mitigation is to disable anonymous ciphers on clients.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.4 | 7.4 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | High | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Confidentiality,Integrity
Technical Impact: Read Application Data; Modify Application Data
Accountability,Non-Repudiation
Technical Impact: Hide Activities
Frequently Asked Questions
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