PT-2021-22700 · Libvirt+9 · Libvirt+9

Gkamathe · Published 2021-03-11 · Updated 2024-04-01 · CVE-2021-3975

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: libvirt (affected versions not specified)

Description: A use-after-free flaw was found in libvirt, where the qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without adequate protection by a monitor lock. This issue can be triggered by the virConnectGetAllDomainStats API when the guest is shutting down, allowing an unprivileged client with a read-only connection to perform a denial of service attack by causing the libvirt daemon to crash.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALSA-2022:1759

ALT-PU-2021-1465

ALT-PU-2021-1881

ALT-PU-2021-1965

CESA-2022_1759

CVE-2021-3975

DLA-3778-1

OESA-2022-1891

RHSA-2022:1759

RHSA-2022_1759

RLSA-2022:1759

SUSE-SU-2022:0031-1

SUSE-SU-2022:0032-1

SUSE-SU-2022:0041-1

SUSE-SU-2022:0042-1

SUSE-SU-2022:0045-1

SUSE-SU-2022:0045-2

SUSE-SU-2022:0128-1

SUSE-SU-2022_0031-1

SUSE-SU-2022_0032-1

SUSE-SU-2022_0041-1

SUSE-SU-2022_0042-1

SUSE-SU-2022_0045-1

SUSE-SU-2022_0128-1

USN-5399-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Centos

Linuxmint

Red Hat

Rocky Linux

Suse

Ubuntu

Libvirt

References · 209

• https://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18ec7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-3975 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2022:0042-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2022-9700.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0128-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-25637 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2022-1891 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2022-1759.html · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2022:1759 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3975 · Patch
• https://bugzilla.redhat.com/show_bug.cgi?id=2024326 · Patch
• https://ubuntu.com/security/CVE-2021-3667 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-3975 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3778-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0041-1 · Vendor Advisory