Denial of service in libvirt

1) Memory leak

EUVDB-ID: #VU76721

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-2023-2700

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak within the virPCIVirtualFunction array within the parent struct's g_autoptr cleanup. A local user can repeatedly query an SR-IOV PCI device's capabilities to cause memory leak and perform denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

libvirt: 4.5.0 - 9.2.0

CPE2.3

• cpe:2.3:a:libvirt_org:libvirt:4.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:4.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:4.7.0:*:*:*:*:*:*:*

External links

https://bugzilla.redhat.com/show_bug.cgi?id=2203653
https://gitlab.com/libvirt/libvirt/-/commit/6425a311b8ad19d6f9c0b315bf1d722551ea3585#874a1e768ade6ceb4538931cbc06248e73223306
https://access.redhat.com/security/cve/CVE-2023-2700

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.