#VU88535 NULL pointer dereference in libvirt - CVE-2024-2496

Vulnerability identifier: #VU88535

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-2496

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
libvirt
Universal components / Libraries / Libraries used by multiple products

Vendor: libvirt.org

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the udevConnectListAllInterfaces() function. A local user can trigger a NULL pointer dereference error when detaching a host interface while at the same time collecting the list of interfaces via virConnectListAllInterfaces API.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libvirt: 9.0.0 - 9.7.0

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External links
https://access.redhat.com/security/cve/CVE-2024-2496
https://bugzilla.redhat.com/show_bug.cgi?id=2269672
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.