- Vulnerability/
- RHSA-2018:3396
RHSA-2018:3396: Important: libvirt security update
First published: Tue Oct 30 2018(Updated: )
The libvirt library contains a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems.<br>Security Fix(es):<br><li> An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639 virt-ssbd AMD)</li> Note: This is the libvirt side of the CVE-2018-3639 mitigation.<br>Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/libvirt | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt-client | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt-client | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt-debuginfo | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt-debuginfo | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt-devel | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt-devel | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt-lock-sanlock | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
| redhat/libvirt-python | <0.10.2-29.el6_5.17 | 0.10.2-29.el6_5.17 |
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Frequently Asked Questions
What is the severity of RHSA-2018:3396?
The severity of RHSA-2018:3396 is classified as important, indicating a significant security vulnerability.
How do I fix RHSA-2018:3396?
To fix RHSA-2018:3396, update the affected packages to version 0.10.2-29.el6_5.17 or later.
Which systems are affected by RHSA-2018:3396?
RHSA-2018:3396 affects various Red Hat packages, including libvirt, libvirt-client, and libvirt-devel version 0.10.2-29.el6_5.17.
Is there any risk associated with RHSA-2018:3396?
Yes, RHSA-2018:3396 poses a risk of potential remote code execution due to vulnerabilities in the libvirt library.
What are the main vulnerabilities in RHSA-2018:3396?
The main vulnerabilities in RHSA-2018:3396 involve issues found in the libvirt API that could be exploited by attackers.
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