CVE-2017-1000256
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.71% probability · 77th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- redhat/libvirt · debian/debian linux
- Source
- cve@mitre.org
EPSS 1.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.debian.org/security/2017/dsa-4003Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-1000256Issue Tracking, Vendor Advisory
- https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1556251.html
- https://www.redhat.com/archives/libvirt-announce/2017-October/msg00001.htmlIssue Tracking, Vendor Advisory
- http://www.debian.org/security/2017/dsa-4003Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-1000256Issue Tracking, Vendor Advisory
- https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1556251.html
- https://www.redhat.com/archives/libvirt-announce/2017-October/msg00001.htmlIssue Tracking, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.