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FreeBSD : xen-kernel -- Information leak via internal x86 system device emulation (5023f559-27e2-11e5-a4a5-002590263bf5)

low Nessus Plugin ID 84701

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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

The Xen Project reports :

Emulation routines in the hypervisor dealing with certain system devices check whether the access size by the guest is a supported one.
When the access size is unsupported these routines failed to set the data to be returned to the guest for read accesses, so that hypervisor stack contents are copied into the destination of the operation, thus becoming visible to the guest.

A malicious HVM guest might be able to read sensitive data relating to other guests.

Solution

Update the affected package.

See Also

http://xenbits.xen.org/xsa/advisory-121.html

http://www.nessus.org/u?a1d5ded1

Plugin Details

Severity: Low

ID: 84701

File Name: freebsd_pkg_5023f55927e211e5a4a5002590263bf5.nasl

Version: 2.4

Type: local

Published: 7/14/2015

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Low

Base Score: 2.1

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:xen-kernel, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 7/11/2015

Vulnerability Publication Date: 3/5/2015

Reference Information

CVE: CVE-2015-2044