CVE-2024-2496: libvirt Null Dereference — Fix

Description

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.

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CVSS v3.1 Score

5.0

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
redhat	libvirt	< 9.8.0
redhat	enterprise_linux	All
redhat	enterprise_linux	All
redhat	enterprise_linux	All
redhat	enterprise_linux	All
redhat	enterprise_linux	All
debian	debian_linux	All

References

Advisories & Patches

https://bugzilla.redhat.com/show_bug.cgi?id=2269672 https://bugzilla.redhat.com/show_bug.cgi?id=2269672

Other References

https://access.redhat.com/errata/RHSA-2024:2236 https://access.redhat.com/security/cve/CVE-2024-2496 https://access.redhat.com/errata/RHSA-2024:2236 https://access.redhat.com/security/cve/CVE-2024-2496 https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html

Frequently Asked Questions

What is CVE-2024-2496? +

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. It has a CVSS v3.1 base score of 5.0 (MEDIUM).

How severe is CVE-2024-2496? +

CVE-2024-2496 has a CVSS v3.1 score of 5.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-2496? +

CVE-2024-2496 affects products from debian, redhat, specifically: debian_linux, enterprise_linux, libvirt. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-2496? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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