libvirt version 2.3.0 and later is vulnerable to a bad default configuration of "verify-peer=no" passed to QEMU by libvirt resulting in a failure to validate SSL/TLS certificates by default.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2017-1000256 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |
| Attack Vector | Adjacent Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | Low |
| Platform | Package | State |
|---|---|---|
| Red Hat Gluster Storage 3 | libvirt | Not affected |
| Red Hat Enterprise Linux 7 | libvirt | Will not fix |
| Red Hat Enterprise Linux 6 | libvirt | Will not fix |
| Red Hat Enterprise Linux 5 | libvirt | Will not fix |
| RHEV Manager 3 | mingw-virt-viewer | Will not fix |
Vulmon