Denial of service in libvirt

1) Memory leak

EUVDB-ID: #VU27541

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-12430

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the domstats command, resulting in a potential denial of service due to an error in the qemuDomainGetStatsIOThread() in qemu/qemu_driver.c in libvirt. A remote attacker can perform a denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libvirt: 4.10.0 - 6.0.0

CPE2.3

• cpe:2.3:a:libvirt_org:libvirt:4.10.0:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:5.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:5.1.0:*:*:*:*:*:*:*

External links

https://bugzilla.redhat.com/show_bug.cgi?id=1804548
https://bugzilla.redhat.com/show_bug.cgi?id=1828190
https://libvirt.org/git/?p=libvirt.git;a=commit;h=9bf9e0ae6af38c806f4672ca7b12a6b38d5a9581

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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