PT-2020-10467 · Libvirt+6 · Libvirt+6

Salvatore Bonaccorso · Published 2020-01-25 · Updated 2023-02-03 · CVE-2019-20485

Positive Technologies (AI Summary)

CVSS v3.1

5.7

Medium

Base vector

AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions libvirt versions prior to 6.0.0

Description The issue is related to the mishandling of the holding of a monitor job during a query to a guest agent in the qemu/qemu driver.c file. This allows attackers to cause a denial of service, resulting in API blockage.

Recommendations For versions prior to 6.0.0, update to version 6.0.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the guest agent query functionality to minimize the risk of exploitation.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALSA-2020:4676

ALT-PU-2020-1097

ALT-PU-2021-1690

ALT-PU-2021-1965

CESA-2020_4000

CESA-2020_4676

CVE-2019-20485

MGASA-2020-0283

RHSA-2020:4000

RHSA-2020:4676

RHSA-2020_4000

RHSA-2020_4676

RLSA-2020:4676

Affected Products

Alt Linux

Almalinux

Astra Linux

Centos

Red Hat

Rocky Linux

Libvirt

References · 59

• https://linux.oracle.com/errata/ELSA-2020-4000.html · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-4676.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-20485 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=1809740 · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2020:4676 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-20485 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2020-0283 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2020-0283.html · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-20485 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-20485 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2020:4676 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2019-20485 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/D5GE6ISYUL3CIWO3FQRUGMKTKP2NYED2 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-5674.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-20485 · Security Note