Low: virt:av and virt-devel:av security and bug fix update

Topic

An update for the virt:av and virt-devel:av modules is now available for Red Hat Enterprise Linux Advanced Virtualization 8.5.

Red Hat Product Security has rated this update as having a security impact of Low. 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):

• nbdkit: NBD_OPT_STRUCTURED_REPLY injection on STARTTLS (CVE-2021-3716)
• QEMU: block: fdc: null pointer dereference may lead to guest crash (CVE-2021-20196)

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):

• There is nbdkit curl error info if convert a guest from VMware without vddk by administrator account [rhel-av-8.5.z] (BZ#2040778)
• Fix data corruption in nbdkit-cow-filter and nbdkit-cache-filter [rhel-av-8.5z] (BZ#2040781)

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 - 1919210 - CVE-2021-20196 QEMU: block: fdc: null pointer dereference may lead to guest crash
• BZ - 1994695 - CVE-2021-3716 nbdkit: NBD_OPT_STRUCTURED_REPLY injection on STARTTLS
• BZ - 2040778 - There is nbdkit curl error info if convert a guest from VMware without vddk by administrator account [rhel-av-8.5.z]
• BZ - 2040781 - Fix data corruption in nbdkit-cow-filter and nbdkit-cache-filter [rhel-av-8.5z]

CVEs

• CVE-2021-3716
• CVE-2021-20196

References

• https://access.redhat.com/security/updates/classification/#low