Input validation error in Xen

1) Input validation error

EUVDB-ID: #VU41859

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:A/AC:L/PR:/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-1893

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

Multiple integer overflows in the (1) FLASK_GETBOOL and (2) FLASK_SETBOOL suboperations in the flask hypercall in Xen 4.1.x, 3.3.x, 3.2.x, and earlier, when XSM is enabled, allow local users to cause a denial of service (processor fault) via unspecified vectors, a different vulnerability than CVE-2014-1891, CVE-2014-1892, and CVE-2014-1894.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Xen: 3.2.0 - 4.1.5

CPE2.3

• cpe:2.3:a:xen_project:xen:3.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:xen_project:xen:3.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:xen_project:xen:3.2.2:*:*:*:*:*:*:*

External links

http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
http://security.gentoo.org/glsa/glsa-201407-03.xml
http://www.openwall.com/lists/oss-security/2014/02/07/12
http://www.openwall.com/lists/oss-security/2014/02/07/4
http://www.openwall.com/lists/oss-security/2014/02/10/8
http://xenbits.xen.org/xsa/advisory-84.html

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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