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RHEL 8.3 Security Update RHSA-2021-1125-01 Low: Qemu Heap Access

red hat
Calendar Grey April 7, 2021
Dist Redhat Esm H88
A patch for virt:8.3 module addressing minor security issues for RHEL 8.3.1 platform.
An update for the virt:8.3 and virt-devel:8.3 modules is now available for Advanced Virtualization for RHEL 8.3.1

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The Advanced Virtualization module provides the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.
Security Fix(es):
* qemu: out-of-bound heap buffer access via an interrupt ID field (CVE-2021-20221)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es):
* Libvirt shouldn't set the MTU of an unmanaged tap/macvtap device, it should just pass the mtu to the guest (BZ#1924681)
* libvirtd crashes in virEventThreadWorker (BZ#1942010)

Topics%20covered

Topics Covered

security advisory low severity RHEL low out-of-bounds access libvirt qemu heap buffer advanced virtualization virt-devel

References

https://access.redhat.com/security/cve/CVE-2021-20221 https://access.redhat.com/security/updates/classification#low

Package List

Advanced Virtualization for RHEL 8.3.1:
Source: SLOF-20200717-1.gite18ddad8.module+el8.3.0+7638+07cf13d2.src.rpm hivex-1.3.18-20.module+el8.3.0+6124+819ee737.src.rpm libguestfs-1.42.0-2.module+el8.3.0+6798+ad6e66be.src.rpm libguestfs-winsupport-8.2-1.module+el8.3.0+6124+819ee737.src.rpm libiscsi-1.18.0-8.module+el8.3.0+6124+819ee737.src.rpm libnbd-1.4.0-2.module+el8.3.0+7998+6ff5e5ab.src.rpm libtpms-0.7.4-1.20201106git2452a24dab.module+el8.3.1+8772+a3fdeccd.src.rpm libvirt-6.6.0-13.2.module+el8.3.1+10483+85317cf0.src.rpm libvirt-dbus-1.3.0-2.module+el8.3.0+6124+819ee737.src.rpm libvirt-python-6.6.0-2.module+el8.3.1+9800+33087bb5.src.rpm nbdkit-1.22.0-2.module+el8.3.0+8203+18ecf00e.src.rpm netcf-0.2.8-12.module+el8.3.0+6124+819ee737.src.rpm perl-Sys-Virt-6.3.0-1.module+el8.3.0+6995+6794eec3.src.rpm python-pyvmomi-6.7.1-7.module+el8.3.0+6124+819ee737.src.rpm qemu-kvm-5.1.0-21.module+el8.3.1+10464+8ad18d1a.src.rpm seabios-1.14.0-1.module+el8.3.0+7638+07cf13d2.src.rpm sgabios-0.20170427git-3.module+el8.3.0+6124+819ee737.src.rpm supermin-5.2.0-1.module+el8.3.0+7648+42900458.src.rpm swtpm-0.4.2-1.20201201git2df14e3.module+el8.3.1+9074+e34e3b04.src.rpm virt-v2v-1.42.0-7.module+el8.3.1+9562+c3ede7c6.src.rpm
aarch64: hivex-1.3.18-20.module+el8.3.0+6124+819ee737.aarch64.rpm

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:1125-01
Product: Advanced Virtualization
Advisory URL: Issue date: 2021-04-07

Topic

An update for the virt:8.3 and virt-devel:8.3 modules is now available forAdvanced Virtualization for RHEL 8.3.1.Red Hat Product Security has rated this update as having a security impactof Low. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory low severity RHEL low out-of-bounds access libvirt qemu heap buffer advanced virtualization virt-devel

Relevant Releases Architectures

Advanced Virtualization CodeReady Builder for RHEL 8.3.1 - aarch64, ppc64le, s390x, x86_64

Advanced Virtualization for RHEL 8.3.1 - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1924601 - CVE-2021-20221 qemu: out-of-bound heap buffer access via an interrupt ID field

1924681 - Libvirt shouldn't set the MTU of an unmanaged tap/macvtap device, it should just pass the mtu to the guest [rhel-8.3.1.z]

1942010 - libvirtd crashes in virEventThreadWorker [rhel-8.3.1.z]

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