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FreeBSD : xen-kernel -- Information leak through version information hypercall (ef9d041e-27e2-11e5-a4a5-002590263bf5)

low Nessus Plugin ID 84716

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Synopsis

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

Description

The Xen Project reports :

The code handling certain sub-operations of the HYPERVISOR_xen_version hypercall fails to fully initialize all fields of structures subsequently copied back to guest memory. Due to this hypervisor stack contents are copied into the destination of the operation, thus becoming visible to the guest.

A malicious 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-122.html

http://www.nessus.org/u?3c28fb66

Plugin Details

Severity: Low

ID: 84716

File Name: freebsd_pkg_ef9d041e27e211e5a4a5002590263bf5.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-2015-2045