Resource management error in Xen

1) Resource management error

EUVDB-ID: #VU32503

Risk: Low

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

CVE-ID: CVE-2014-5149

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, when using shadow pagetables, 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-2014-5146.

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

https://lists.fedoraproject.org/pipermail/package-announce/2014-August/136980.html
https://lists.fedoraproject.org/pipermail/package-announce/2014-August/136981.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
https://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
https://www.securityfocus.com/bid/69199
https://www.securitytracker.com/id/1030723
https://xenbits.xen.org/xsa/advisory-97.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/95235
https://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.