CVE-2021-3975

Description

A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial of service attack by causing the libvirt daemon to crash.

Scores

Weaknesses (CWE)

• CWE-416

European references

• ENISA EUVD · EUVD-2021-27180
• GCVE · GCVE-0-2021-3975

Affected configurations (NVD CPE)

• cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:* < 7.1.0
• cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.6:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.6:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:*
• cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
• cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*

Affected products

References

• https://bugzilla.redhat.com/show_bug.cgi?id=2024326
• https://access.redhat.com/security/cve/CVE-2021-3975
• https://ubuntu.com/security/CVE-2021-3975
• https://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18ec7
• https://security.netapp.com/advisory/ntap-20221201-0002/
• https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html

Sources