Ubuntu update for libvirt

Published: 2020-05-23

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-10703 CVE-2020-12430
CWE-ID	CWE-399 CWE-401
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	libvirt (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU28191

Risk: Low

CVSSv3.1: 2.4 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10703

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources with the application when performing pool lookups within the storagePoolLookupByTargetPath() function in storage/storage_driver.c. A remote user can create a pool with empty target path and then perform search for an empty target, which results in libvirt crash.

Mitigation

Update the affected packages.

Ubuntu 19.10: libvirt-clients - 5.4.0-0ubuntu5.4; libvirt-daemon - 5.4.0-0ubuntu5.4; libvirt0 - 5.4.0-0ubuntu5.4
Ubuntu 18.04 LTS: libvirt-clients - 4.0.0-1ubuntu8.17; libvirt-daemon - 4.0.0-1ubuntu8.17; libvirt0 - 4.0.0-1ubuntu8.17

Vulnerable software versions

libvirt (Ubuntu package): 4.0.0-1ubuntu8.1 - 5.4.0-0ubuntu5.3

External links

http://usn.ubuntu.com/4371-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Memory leak

EUVDB-ID: #VU27541

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12430

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