CVE-2024-2496: Libvirt: null pointer dereference in udevconnectlistallinterfaces()
First published: Fri Mar 15 2024(Updated: )
A NULL pointer dereference flaw was found in the udevConnectListAllInterfaces() function in libvirt. This issue can occur when detaching a host interface while at the same time collecting the list of interfaces via virConnectListAllInterfaces API. This flaw could be used to perform a denial of service attack by causing the libvirt daemon to crash.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/libvirt | <6.0.0-0ubuntu8.19 | 6.0.0-0ubuntu8.19 |
| ubuntu/libvirt | <8.0.0-1ubuntu7.10 | 8.0.0-1ubuntu7.10 |
| ubuntu/libvirt | <9.6.0-1ubuntu1.1 | 9.6.0-1ubuntu1.1 |
| ubuntu/libvirt | <9.8.0-1 | 9.8.0-1 |
| redhat/libvirt | <9.8.0 | 9.8.0 |
| debian/libvirt | <=5.0.0-4+deb10u1<=7.0.0-3+deb11u2<=9.0.0-4 | 5.0.0-4+deb10u2 10.2.0-1 10.3.0-1 |
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Reference Links
- https://gitlab.com/libvirt/libvirt/-/commit/2ca94317ac642a70921947150ced8acc674ccdc8
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2266014
- https://bugzilla.redhat.com/show_bug.cgi?id=2269672
- https://access.redhat.com/security/cve/CVE-2024-2496
- https://www.cve.org/CVERecord?id=CVE-2024-2496
- https://ubuntu.com/security/notices/USN-6734-1
- https://nvd.nist.gov/vuln/detail/CVE-2024-2496
- https://launchpad.net/bugs/cve/CVE-2024-2496
- https://security-tracker.debian.org/tracker/CVE-2024-2496
- https://ubuntu.com/security/CVE-2024-2496
- https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
- https://access.redhat.com/errata/RHSA-2024:2236
Frequently Asked Questions
What is the severity of CVE-2024-2496?
CVE-2024-2496 is classified as a moderate severity vulnerability due to the potential for exploitation through NULL pointer dereference.
How do I fix CVE-2024-2496?
To fix CVE-2024-2496, upgrade to the affected libvirt versions listed as 6.0.0-0ubuntu8.19, 8.0.0-1ubuntu7.10, 9.6.0-1ubuntu1.1, or 9.8.0-1.
Which systems are affected by CVE-2024-2496?
CVE-2024-2496 affects specific versions of libvirt on Ubuntu, RedHat, and Debian systems.
What can happen if CVE-2024-2496 is exploited?
Exploitation of CVE-2024-2496 can lead to potential denial of service conditions by causing application crashes.
Is there a specific Mitigation for CVE-2024-2496?
The recommended mitigation for CVE-2024-2496 is to ensure that the affected versions of libvirt are updated immediately.
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