Citrix XenServer Multiple Vulnerabilities (CTX200892)

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.

Synopsis :

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

Description :

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.

See also :

Solution :

Apply the relevant hotfix referenced in the vendor advisory.

Risk factor :

Medium / CVSS Base Score : 5.0
CVSS Temporal Score : 3.7
Public Exploit Available : false

Family: Misc.

Nessus Plugin ID: 83163 ()

Bugtraq ID: 69654

CVE ID: CVE-2014-3615

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