NULL pointer dereference in libvirt - CVE-2019-3840

Vulnerability identifier: #VU18154

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-3840

CWE-ID: CWE-476

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dreference error in libvirt in the way it processes 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 (DoS).

libvirt
libvirt (Alpine package)
libvirt
Red Hat Gluster Storage Server for On-premise
Red Hat Virtualization for IBM Power LE
Red Hat Virtualization
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Opensuse
Fedora

Update to version 5.0.0.

libvirt - update to 5.0.0
libvirt (Alpine package) - update to 4.10.0-r2
libvirt - update to 4.7.0-2.fc29

• https://libvirt.org/git/?p=libvirt.git&a=commitdiff&h=9ed175fbc2deecfdaeabca7bc77c7e7ae33a3377
• https://libvirt.org/git/?p=libvirt.git&a=patch&h=9ed175fbc2deecfdaeabca7bc77c7e7ae33a3377

• Denial of service in libvirt
• OpenSUSE Linux update for libvirt
• OpenSUSE Linux update for libvirt
• Red Hat update for libvirt
• NULL pointer dereference in libvirt (Alpine package)
• Fedora 29 update for libvirt