# CVE-2019-3840: libnss-libvirt: A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface informati...

CVE-2019-3840 is fixed in 12 products on 1 platform, first by libnss-libvirt 4.0.0-1ubuntu8.8, released February 26, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-3840
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0148
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2019

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libnss-libvirt Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libnss-libvirt 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnss-libvirt-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-bin Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-bin 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-bin-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-clients Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-clients 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-clients-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-daemon Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-daemon 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-daemon-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-daemon-driver-storage-gluster Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-daemon-driver-storage-gluster 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-daemon-driver-storage-gluster-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-daemon-driver-storage-rbd Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-daemon-driver-storage-rbd 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-daemon-driver-storage-rbd-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-daemon-driver-storage-sheepdog Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-daemon-driver-storage-sheepdog 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-daemon-driver-storage-sheepdog-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-daemon-driver-storage-zfs Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-daemon-driver-storage-zfs 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-daemon-driver-storage-zfs-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-daemon-system Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-daemon-system 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-daemon-system-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-sanlock Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-sanlock 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-sanlock-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt-wireshark Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt-wireshark 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt-wireshark-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |
| Linux | libvirt0 Ubuntu 18.04.6 LTS (bionic) | 4.0.0-1ubuntu8.8 | [libvirt0 4.0.0-1ubuntu8.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvirt0-4.0.0-1ubuntu8.8.md) | Feb 26, 2019 |

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