CVE-2019-3840: Null Pointer Dereference
First published: Thu Jan 10 2019(Updated: )
A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface information through the QEMU agent. An attacker in a guest VM can use this flaw to crash libvirtd and cause a denial of service.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libvirt | <5.0.0 | 5.0.0 |
| Redhat Libvirt | <5.0.0 | |
| openSUSE Leap | =15.0 | |
| openSUSE Leap | =42.3 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00101.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00105.html
- https://access.redhat.com/errata/RHSA-2019:2294
- https://bugzilla.redhat.com/show_bug.cgi?id=1663051
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3840
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7/
- https://www.redhat.com/archives/libvir-list/2019-January/msg00241.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1663051
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1665229
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1665230
- https://access.redhat.com/security/cve/cve-2019-3840
- https://bugzilla.redhat.com/show_bug.cgi?id=1665228
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7/
Frequently Asked Questions
What is CVE-2019-3840?
CVE-2019-3840 is a vulnerability discovered in libvirt, versions before 5.0.0, that allows an attacker in a guest VM to crash libvirtd and cause a denial of service.
How does CVE-2019-3840 affect libvirt?
CVE-2019-3840 affects libvirt by causing a NULL pointer dereference flaw in the way it gets interface information through the QEMU agent.
What is the severity level of CVE-2019-3840?
The severity level of CVE-2019-3840 is medium, with a severity value of 6.3.
How can CVE-2019-3840 be fixed?
To fix CVE-2019-3840, update libvirt to version 5.0.0 or later.
Are there any references for CVE-2019-3840?
Yes, you can find references for CVE-2019-3840 at the following links: [1](http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00101.html), [2](http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00105.html), [3](https://access.redhat.com/errata/RHSA-2019:2294)
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