CVE-2021-3559: Buffer Overflow
First published: Wed May 19 2021(Updated: )
A flaw was found in libvirt in the virConnectListAllNodeDevices API in versions before 7.0.0. It only affects hosts with a PCI device and driver that supports mediated devices (e.g., GRID driver). This flaw could be used by an unprivileged client with a read-only connection to crash the libvirt daemon by executing the 'nodedev-list' virsh command. The highest threat from this vulnerability is to system availability.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Redhat Libvirt | >=6.10.0<7.0.0 | |
| NetApp ONTAP Select Deploy administration utility | ||
| redhat/libvirt | <7.0.0 | 7.0.0 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1962306
- https://security.netapp.com/advisory/ntap-20210706-0006/
- https://gitlab.com/libvirt/libvirt/-/commit/4c4d0e2da07b5a035b26a0ff13ec27070f7c7b1a
- https://gitlab.com/libvirt/libvirt/-/commit/f1b08901f7ae7557f79d83bdac33cc0bd79d1437
- https://access.redhat.com/security/cve/cve-2021-3559
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1962605
Frequently Asked Questions
What is the vulnerability ID of this flaw in libvirt?
The vulnerability ID of this flaw in libvirt is CVE-2021-3559.
What is the affected software?
The affected software includes Redhat Libvirt and NetApp ONTAP Select Deploy administration utility.
What is the severity of CVE-2021-3559?
The severity of CVE-2021-3559 is medium (CVSS score: 6.5).
How does CVE-2021-3559 affect hosts with a PCI device and driver?
CVE-2021-3559 only affects hosts with a PCI device and driver that supports mediated devices (e.g., GRID driver).
How can an unprivileged client exploit CVE-2021-3559?
An unprivileged client with a read-only connection can use CVE-2021-3559 to crash the libvirt daemon.
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