REDHAT-BUG-986386
First published: Fri Jul 19 2013(Updated: )
If users haven't configured guest agent then qemuAgentCommand() will dereference a NULL 'mon' pointer. A remote user able to issue commands to libvirt daemon could use this flaw to crash libvirtd. References: <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED ERRATA - Crash of libvirtd without guest agent configuration" href="show_bug.cgi?id=984821">https://bugzilla.redhat.com/show_bug.cgi?id=984821</a> <a href="https://www.redhat.com/archives/libvir-list/2013-July/msg00992.html">https://www.redhat.com/archives/libvir-list/2013-July/msg00992.html</a> Acknowledgements: This issue was discovered by Alex Jia of Red Hat.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libvirt |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=984821
- https://www.redhat.com/archives/libvir-list/2013-July/msg00992.html
- http://libvirt.org/git/?p=libvirt.git;a=commit;h=96518d4316b711c72205117f8d5c967d5127bbb6
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=986406
- https://bugzilla.redhat.com/show_bug.cgi?id=986386
Frequently Asked Questions
What is the severity of REDHAT-BUG-986386?
The severity of REDHAT-BUG-986386 is considered moderate, as it allows a remote user to crash the libvirtd service.
How do I fix REDHAT-BUG-986386?
To fix REDHAT-BUG-986386, ensure that the guest agent is properly configured to avoid NULL pointer dereferencing.
Who is affected by REDHAT-BUG-986386?
Users of Red Hat libvirt without a configured guest agent are affected by REDHAT-BUG-986386.
What actions can an attacker take with REDHAT-BUG-986386?
An attacker could issue commands to the libvirt daemon and potentially crash libvirtd due to this vulnerability.
Is there a workaround for REDHAT-BUG-986386?
Currently, the best workaround for REDHAT-BUG-986386 is to disable remote command access to the libvirt daemon until it is properly patched.
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