Xen Hypervisor Multiple Vulnerabilities (XSA-231 - XSA-234)

High Nessus Plugin ID 103328


The remote Xen hypervisor installation is missing a security update.


According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by multiple vulnerabilities :

- A flaw exists in the alloc_heap_pages() function due to improper handling when 'node >= MAX_NUMNODES'. A guest attacker can use crafted hypercalls to execute arbitrary code on the host system. (CVE-2017-14316)

- A double-free flaw exists in the domain_cleanup() function within 'xenstored_domain.c'. A local attacker can use this flaw to crash the xenstored daemon which potentially could cause a denial of service.

- A null pointer dereference flaw exists in the
__gnttab_cache_flush() function. An attacker could potentially leverage this flaw to crash the host system from a guest system. (CVE-2017-14318)

- A flaw exists within 'arch/x86/mm.c'. An attacker could leverage this vulnerability to gain elevated privileges on the host system from a guest system. (CVE-2017-14319)

Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.


Apply the appropriate patch according to the vendor advisory.

See Also






Plugin Details

Severity: High

ID: 103328

File Name: xen_server_XSA-234.nasl

Version: $Revision: 1.3 $

Type: local

Family: Misc.

Published: 2017/09/19

Modified: 2017/09/21

Dependencies: 78089

Risk Information

Risk Factor: High


Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C


Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/o:xen:xen

Required KB Items: installed_sw/Xen Hypervisor, Settings/ParanoidReport

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2017/09/12

Vulnerability Publication Date: 2017/09/12

Reference Information

CVE: CVE-2017-14316, CVE-2017-14317, CVE-2017-14318, CVE-2017-14319

BID: 100817, 100818, 100819, 100826

OSVDB: 165306, 165307, 165348, 165349

IAVB: 2017-B-0128