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RedHat: RHSA-2021-3900-01 Critical: Linux Kernel Heap Overflow Issue

red hat
Calendar Grey October 9, 2018
Dist Redhat Esm H88
The latest advisory from Red Hat concerning qemu-kvm-rhev highlights a significant update focused on rectifying severe heap corruption vulnerabilities.
An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7

Solution

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

https://access.redhat.com/articles/2974891

After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect.

Summary

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.
Security Fix(es):
* QEMU: slirp: heap buffer overflow while reassembling fragmented datagrams (CVE-2018-11806)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Red Hat would like to thank Jskz - Zero Day Initiative (trendmicro.com) for reporting this issue.

Topics%20covered

Topics Covered

security advisory heap overflow important update qemu-kvm-rhev Red Hat Virtualization

References

https://access.redhat.com/security/cve/CVE-2018-11806 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts:
Source: qemu-kvm-rhev-2.10.0-21.el7_5.7.src.rpm
ppc64le: qemu-img-rhev-2.10.0-21.el7_5.7.ppc64le.rpm qemu-kvm-common-rhev-2.10.0-21.el7_5.7.ppc64le.rpm qemu-kvm-rhev-2.10.0-21.el7_5.7.ppc64le.rpm qemu-kvm-rhev-debuginfo-2.10.0-21.el7_5.7.ppc64le.rpm qemu-kvm-tools-rhev-2.10.0-21.el7_5.7.ppc64le.rpm
x86_64: qemu-img-rhev-2.10.0-21.el7_5.7.x86_64.rpm qemu-kvm-common-rhev-2.10.0-21.el7_5.7.x86_64.rpm qemu-kvm-rhev-2.10.0-21.el7_5.7.x86_64.rpm qemu-kvm-rhev-debuginfo-2.10.0-21.el7_5.7.x86_64.rpm qemu-kvm-tools-rhev-2.10.0-21.el7_5.7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:2887-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2018:2887
Issue date: 2018-10-09

Topic

An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory heap overflow important update qemu-kvm-rhev Red Hat Virtualization

Relevant Releases Architectures

Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts - ppc64le, x86_64

Bugs Fixed

1586245 - CVE-2018-11806 QEMU: slirp: heap buffer overflow while reassembling fragmented datagrams

1619128 - VM doesn't boot from HD [rhel-7.5.z]

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