CVE-2024-8235: libvirt Null Dereference — Fix

Description

A flaw was found in libvirt. A refactor of the code fetching the list of interfaces for multiple APIs introduced a corner case on platforms where allocating 0 bytes of memory results in a NULL pointer. This corner case would lead to a NULL-pointer dereference and subsequent crash of virtinterfaced. This issue could allow clients connecting to the read-only socket to crash the virtinterfaced daemon.

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CVSS v3.1 Score

6.2

MEDIUM

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

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
redhat	libvirt	10.4.0 — 10.7.0
redhat	enterprise_linux	All

References

Advisories & Patches

https://access.redhat.com/security/cve/CVE-2024-8235 https://bugzilla.redhat.com/show_bug.cgi?id=2308680 https://lists.libvirt.org/archives/list/[email protected]/thread/X6WOVCL6QF3FQRFIIXL736RFZVSUWLWJ/

Other References

https://access.redhat.com/errata/RHSA-2024:9128 https://security.netapp.com/advisory/ntap-20240920-0006/

Frequently Asked Questions

What is CVE-2024-8235? +

A flaw was found in libvirt. A refactor of the code fetching the list of interfaces for multiple APIs introduced a corner case on platforms where allocating 0 bytes of memory results in a NULL pointer. This corner case would lead to a NULL-pointer dereference and subsequent crash of virtinterfaced. This issue could allow clients connecting to the read-only socket to crash the virtinterfaced daemon. It has a CVSS v3.1 base score of 6.2 (MEDIUM).

How severe is CVE-2024-8235? +

CVE-2024-8235 has a CVSS v3.1 score of 6.2 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-2024-8235? +

CVE-2024-8235 affects products from redhat, specifically: enterprise_linux, libvirt. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-8235? +

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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