CVE-2019-20485 — qemu/qemu_driver

qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a guest agent, which allows attackers to cause a denial of service (API blockage).

01What is this vulnerability?

qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a guest agent, which allows attackers to cause a denial of service (API blockage).

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-03-19T01:29:44.000Z
• Last modified: 2024-08-05T02:39:10.227Z

09References

• libvirt.org — https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=a663a860819287e041c3de672a…
• www.mail-archive.com — https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1730509.html
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1809740
• security-tracker.debian.org — https://security-tracker.debian.org/tracker/CVE-2019-20485
• bugs.debian.org — https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=953078
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…