Resource management error in Xen

1) Resource management error

EUVDB-ID: #VU32502

Risk: Low

CVSSv3.1: 5.4 [CVSS:3.1/CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-5146

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

Certain MMU virtualization operations in Xen 4.2.x through 4.4.x before the xsa97-hap patch, when using Hardware Assisted Paging (HAP), are not preemptible, which allows local HVM guest to cause a denial of service (vcpu consumption) by invoking these operations, which process every page assigned to a guest, a different vulnerability than CVE-2014-5149.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Xen: 4.2.0 - 4.2.5

CPE2.3

• cpe:2.3:a:xen_project:xen:4.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:xen_project:xen:4.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:xen_project:xen:4.2.2:*:*:*:*:*:*:*

External links

http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136980.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136981.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
http://www.securityfocus.com/bid/69198
http://www.securitytracker.com/id/1030723
http://xenbits.xen.org/xsa/advisory-97.html
http://exchange.xforce.ibmcloud.com/vulnerabilities/95234
http://security.gentoo.org/glsa/201504-04

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.