Synopsis
Important: virt:8.2 and virt-devel:8.2 security and bug fix update
Type/Severity
Security Advisory: Important
Topic
An update for the virt:8.2 and virt-devel:8.2 modules is now available for Advanced Virtualization for RHEL 8.2.1.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
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):
- libvirt: leak of /dev/mapper/control into QEMU guests (CVE-2020-14339)
- QEMU: slirp: networking out-of-bounds read information disclosure vulnerability (CVE-2020-10756)
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):
- QEMU command 'transaction': Bitmap already exists: libvirt-tmp-activewrite (BZ#1861681)
- qemu-img convert uses possibly slow pre-zeroing on block storage (BZ#1861682)
- from time to time virsh net-dhcp-leases does not show all leases (BZ#1868271)
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
Affected Products
-
Red Hat Enterprise Linux Advanced Virtualization 8 x86_64
-
Red Hat Enterprise Linux Advanced Virtualization (for RHEL Server for IBM Power LE) 8 ppc64le
-
Red Hat Enterprise Linux Advanced Virtualization (for RHEL Server for ARM 64) 8 aarch64
-
Red Hat Enterprise Linux Advanced Virtualization (for RHEL Server for IBM System Z) 8 s390x
Fixes
- BZ - 1835986 - CVE-2020-10756 QEMU: slirp: networking out-of-bounds read information disclosure vulnerability
- BZ - 1860069 - CVE-2020-14339 libvirt: leak of /dev/mapper/control into QEMU guests
- BZ - 1861681 - QEMU command 'transaction': Bitmap already exists: libvirt-tmp-activewrite [rhel-8.2.1.z]
- BZ - 1861682 - qemu-img convert uses possibly slow pre-zeroing on block storage [rhel-8.2.1.z]
- BZ - 1868271 - from time to time virsh net-dhcp-leases <net> does not show all leases [rhel-8.2.1.z]
CVEs
References
Vulmon