CVE-2019-20485: Input Validation
First published: Thu Dec 05 2019(Updated: )
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).
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libvirt | <0:4.5.0-36.el7 | 0:4.5.0-36.el7 |
| debian/libvirt | <=5.6.0-2<=5.6.0-3 | |
| Redhat Libvirt | <6.0.0 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Fedoraproject Fedora | =31 | |
| redhat/libvirt | <6.0.0 | 6.0.0 |
| debian/libvirt | 7.0.0-3+deb11u2 9.0.0-4 10.5.0-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2019-20485 https://nvd.nist.gov/vuln/detail/CVE-2019-20485
- https://bugzilla.redhat.com/show_bug.cgi?id=1809740
- https://access.redhat.com/errata/RHBA-2020:2017
- https://access.redhat.com/errata/RHSA-2020:4000
- https://access.redhat.com/errata/RHSA-2020:4676
- https://access.redhat.com/security/cve/cve-2019-20485
- https://security-tracker.debian.org/tracker/CVE-2019-20485
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20485
- https://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=a663a860819287e041c3de672aad1d8543098ecc
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=953078
- https://libvirt.org/git/?p=libvirt.git;a=commit;h=a663a860819287e041c3de672aad1d8543098ecc
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D5GE6ISYUL3CIWO3FQRUGMKTKP2NYED2/
- https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1730509.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1809741
- https://access.redhat.com/support/policy/updates/errata/
- https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=a663a860819287e041c3de672aad1d8543098ecc
- https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1730509.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5GE6ISYUL3CIWO3FQRUGMKTKP2NYED2/
- https://listman.redhat.com/archives/libvir-list/2019-December/msg00313.html
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2019-20485?
CVE-2019-20485 is a vulnerability found in libvirt where the libvirtd daemon can be blocked indefinitely by a malicious guest-agent.
How does CVE-2019-20485 affect libvirt?
CVE-2019-20485 affects libvirt by allowing a malicious guest-agent to block the libvirtd daemon indefinitely.
What is the severity rating of CVE-2019-20485?
CVE-2019-20485 has a severity rating of 5.8 (High).
How can I fix CVE-2019-20485?
To fix CVE-2019-20485, update libvirt to version 6.0.0 or higher.
Where can I find more information about CVE-2019-20485?
You can find more information about CVE-2019-20485 at the following references: [link1], [link2], [link3].
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