Resource management error in Xen

1) Resource management error

EUVDB-ID: #VU32490

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-7188

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The hvm_msr_read_intercept function in arch/x86/hvm/hvm.c in Xen 4.1 through 4.4.x uses an improper MSR range for x2APIC emulation, which allows local HVM guests to cause a denial of service (host crash) or read data from the hypervisor or other guests via unspecified vectors.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Xen: 3.4.1 - 4.14.0

CPE2.3

• cpe:2.3:a:xen_project:xen:3.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:xen_project:xen:4.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:xen_project:xen:4.1.1:*:*:*:*:*:*:*

External links

http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140199.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html
http://secunia.com/advisories/61664
http://secunia.com/advisories/61858
http://secunia.com/advisories/61890
http://security.gentoo.org/glsa/glsa-201412-42.xml
http://support.citrix.com/article/CTX200218
http://support.citrix.com/article/CTX201794
http://www.c7zero.info/stuff/csw2017_ExploringYourSystemDeeper_updated.pdf
http://www.debian.org/security/2014/dsa-3041
http://www.securityfocus.com/bid/70198
http://www.securitytracker.com/id/1030936
http://xenbits.xen.org/xsa/advisory-108.html
http://exchange.xforce.ibmcloud.com/vulnerabilities/96785

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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