Ubuntu update for libvirt



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
 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

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

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

CPE2.3 External links

https://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

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

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

CPE2.3 External links

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


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.



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