CVE-2019-3840

libvirt: NULL pointer dereference after running qemuAgentCommand in qemuAgentGetInterfaces function

Severity Score

6.3

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha descubierto un error de desreferencia de puntero NULL en libvirt, en versiones anteriores a la 5.0.0, en la forma en la que obtiene información de la interfaz mediante el agente QEMU. Un atacante en una máquina virtual invitada puede emplear este error para provocar el cierre inesperado de libvirtd y provocar una denegación de servicio (DoS).

A NULL pointer dereference flaw was discovered in libvirt 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.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-01-03 CVE Reserved
2019-03-14 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-08-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (9)

URL	Tag	Source

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1663051	2024-08-04
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3840	2024-08-04
https://www.redhat.com/archives/libvir-list/2019-January/msg00241.html	2024-08-04

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00101.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00105.html	2023-11-07
https://access.redhat.com/errata/RHSA-2019:2294	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7	2023-11-07
https://access.redhat.com/security/cve/CVE-2019-3840	2019-08-06
https://bugzilla.redhat.com/show_bug.cgi?id=1665228	2019-08-06

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Redhat Search vendor "Redhat"		Libvirt Search vendor "Redhat" for product "Libvirt"				< 5.0.0 Search vendor "Redhat" for product "Libvirt" and version " < 5.0.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.0 Search vendor "Opensuse" for product "Leap" and version "15.0"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.3 Search vendor "Opensuse" for product "Leap" and version "42.3"		-		Affected