Local denial of service in libvirt

1) NULL pointer dereference

EUVDB-ID: #VU88535

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-2496

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

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

External links

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

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.