Vulnerability Monitor

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CVE-2019-3840

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.8, indicating it can be exploited remotely over the network but requires specific conditions to be met though user interaction is required requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 2 products from redhat, from opensuse organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-03-27T13:29:01.680

Last Modified

2024-11-21T04:42:40.563

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.8 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: SINGLE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

6.8

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-476
Type: Primary
CWE-476

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	redhat	libvirt	< 5.0.0	Yes
Operating System	opensuse	leap	15.0	Yes
Operating System	opensuse	leap	42.3	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00101.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00105.html Mailing List, Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2019:2294 ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1663051 Exploit, Issue Tracking, Third Party Advisory, Vendor Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3840 Exploit, Issue Tracking, Patch, Vendor Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7/ ([email protected])
https://www.redhat.com/archives/libvir-list/2019-January/msg00241.html Exploit, Vendor Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00101.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00105.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2019:2294 (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1663051 Exploit, Issue Tracking, Third Party Advisory, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3840 Exploit, Issue Tracking, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TZRP2BRMI4RYFRPNFTTIAAUOGVN2ORP7/ (af854a3a-2127-422b-91ae-364da2661108)
https://www.redhat.com/archives/libvir-list/2019-January/msg00241.html Exploit, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For redhat's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.