Citrix XenServer Multiple Vulnerabilities (CTX200892)
medium Nessus Plugin ID 83163
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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.
(CVE-2014-8106)
Note that environments that contain only PV guests are not vulnerable to these issues.
Solution
Apply the relevant hotfix referenced in the vendor advisory.See Also
Plugin Details
Severity: Medium
ID: 83163
File Name: citrix_xenserver_CTX200892.nasl
Version: 1.11
Type: local
Family: Misc.
Published: 4/30/2015
Updated: 11/22/2019
Dependencies: citrix_xenserver_version.nbin
Risk Information
CVSS Score Source: CVE-2014-8106
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Temporal Score: 3.4
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Temporal Vector: E:U/RL:OF/RC:C
CVSS v3
Risk Factor: Medium
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: E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:citrix:xenserver
Required KB Items: Host/XenServer/version, Host/local_checks_enabled
Exploit Ease: No known exploits are available
Patch Publication Date: 4/14/2015
Vulnerability Publication Date: 9/4/2014