Citrix XenServer Multiple Vulnerabilities (CTX200892)

Medium Nessus Plugin ID 83163


The remote host is missing a vendor-supplied security patch.


The version of Citrix XenServer installed on the remote host is affected by multiple vulnerabilities :

- A flaw exists in the VGA emulator in QEMU that allows a local guest user to read host memory by setting the display to a high resolution. (CVE-2014-3615)

- A flaw exists in the set_pixel_format() function within ui/vnc.c in QEMU that allows a remote attacker, using a small bytes_per_pixel value, to cause a denial of service condition. (CVE-2014-7815)

- A heap-based buffer overflow flaw exists in the Cirrus VGA emulator that allows local guest users to execute arbitrary code via vectors related to blit regions.

Note that environments that contain only PV guests are not vulnerable to these issues.


Apply the relevant hotfix referenced in the vendor advisory.

See Also

Plugin Details

Severity: Medium

ID: 83163

File Name: citrix_xenserver_CTX200892.nasl

Version: $Revision: 1.9 $

Type: local

Family: Misc.

Published: 2015/04/30

Modified: 2017/02/08

Dependencies: 76770

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 3.7

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

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


Base Score: 5.3

Temporal Score: 4.6

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:citrix:xenserver

Required KB Items: Host/XenServer/version, Host/local_checks_enabled

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/04/14

Vulnerability Publication Date: 2014/09/04

Reference Information

CVE: CVE-2014-3615, CVE-2014-7815, CVE-2014-8106

BID: 69654, 70998, 71477

OSVDB: 111030, 113748, 115343, 115344